just saying that in the current state of the meta, all the new home mons are legal; if you've ever wanted to see what inh ubers might've been like, now's your chance lol
anyways, some quick post home analysis; haven't had a chance to playtest yet so this is mostly speculation.
new potentially viable inheritors:

regenvest could be cool, but it does have to compete with both roaring moon and goodra (both forms). neutral/resist on both of flutter mane's stabs along with neutralities to basically everything could be useful, but it mostly boils down to your use case. loses hard to moth though.

is a decent enough check to tusk/gapdos but i'm not entirely convinced by 90/90 bulk, even if it's behind intim from squawkabilly as a donor. hard to say if it has much use outside of that.

can run scrappy sets with decidueye-h but i'm mainly scared of unburden sets from hawlucha/sneasler, as rillaboom is back for terrain setting. access to tera fly/fight and taunt makes it incredibly difficult to check, as it basically only needs cc/acro to decimate an entire team, allowing it a moveslot to shut down unawares with taunt.

mostly in the same boat as zapdos, only way more reliant on boots.

an interesting mon, could run regen sets with cyclizar/glowking or levitate sets defensively, but given that it's competing with ghold and mag i think it's a bit hard to justify atm, given that it doesn't have a strong niche anywhere else and matches up poorly against basically every good mon in the meta.

competes heavily with tusk; tusk's much higher overall bulk is very appealing but certain sets (i.e. stakeout from gumshoos) might be a bit better on lando.

it's running regenvest in aaa right now, maybe it could do the same here? it unfortunately still loses to moth but basically every regenvester not named roaring moon does so w/e.

massive bulk and a good typing makes it a prime candidate for regenvest with cyclizar as a donor. unfortunately it STILL loses to moth so i'd still use roaring moon over this while moth is still legal.

i'm sure it has a niche somewhere, it's just outclassed in most roles as far as i can tell and loses 1v1 to a lot of top mons. it has surprisingly decent bulk so espathra could be a scary option.

mostly overlaps with ghold as far as i can tell, basically if you want to use mag as an inheritor you'd have to justify using it over the string cheese guy.

competes with sneasler and gapdos, might have some niche somewhere but i find it hard to imagine what either form could achieve that the aforementioned competitors wouldn't do better.

rillaboom lost gglide altogether this gen, so unfortunately it can't run gglide; that said, zarude-rilla is probably still decent, especially since corv isn't amazing in the current meta.

it's fast and sometimes that's all a pokemon needs. could be cool for hazards and aurora veil if you're into that.

worse mane, worse pult; unless those two are banned i can't see spect being amazing in many regards.

terrorizes standard play and a decent chunk of om's; don't see too many viable donors for it outside of dragonite or hariyama (for fake out, losing sd) but is probably still pretty good even if you just use a normal ursaluna. ph could also be neatish but breloom's movepool isn't exactly stellar.

130/120 atk/spe and fighting/poison typing is cool because it resists bpress, is immune to toxic, and can still pack a punch with cc; basically harder for the likes of dozo to punish, or eq-less tusk. hisui guy mentioned a decidueye-h set above me which could be neat.
new donors:

rock head and a plethora of strong recoil moves; don't think it'll be amazing but i think still worth mentioning.

not having a particularly useful ability sucks, but its huge movepool could be useful enough to ignore that downside. idk where it'd be useful but maybe tusk would appreciate it?

it's like slowking, but with toxic. like straight up everything that was previously running slowking can now get toxic for free, which is a pretty significant buff imo - makes switching into slowking inheritors more difficult.

gives levitate, moonlight, tr, lunar dance. could be useful defensively on pokemon like ghold that benefit a lot from levitate, or it could be used on tr to pretty good effect.

sharpness and a bevy of slicing moves, not the least of which being ceaseless edge. unblockable, untauntable spikes could be an interesting tool for a lot of different mons.

idk victory dance is cool. hate missing with hustle but chlorophyll is also acceptable. still going to struggle with unawares though.

scrappy, cc, brave bird, knock, and even triple arrows. should be pretty scary to deal with especially because its inheritors can just ignore immunities and fish for def drops/flinches to break past checks.

has sharpness and stone axe, but hard to really justify using over samurott-h imo, although u-turn is neat.

contrary superpower, moonblast, ep, mystical fire, etc; this mon was basically designed to be used on valiant. obviously contrary superpower can be scary on a lot of stuff, but this is the first set that came to mind. the prevalence of unaware and ghosts atm hurts it a decent bit, but it does get taunt so unaware is not necessarily as big of an issue as it might seem.
some personal notes:

mag is a huge boon for flutter mane, as it gives it an extremely powerful nuke in fleur cannon that still overall outdamages moonblast over two turns, access to soul heart for sweeping potential, spikes, and very importantly volt switch, meaning previously solid checks like blissey are prone to getting pivoted on now.

man this thing is broken

this pokemon is still fanatastic, but mag inheritors might prove to be an issue for it and the influx of fighting types will be able to exploit it

previously i liked running dozo over pex, but with the fighting types on the loose i think pex can be more worth running than dozo in some cases, especially if your team is very fighting weak.