Yeah she does Beastality and Grape often, also whenever she draws Lumine it's turning 80% of the time to inc3st so it was really just a matter of time, funnily enough the Pic that got her nuked what i heared on Twitter was her Comission for Keqing who gets forced into NTR by some Eremites so by Destryoing her most Stable Ship (Aeqing) she also killed her Paetreon XD (Kinda deserved cause i really liked her Version of Aether and Keqing^^)
Let's clarify some shit.
1) Nyantcha hardly does anything that related to bestiality.
Furry shit? Shit whatever I guess. Furries can have their animorphs and anthomorphs etc, but the moment Nyantcha draws some Mitachurl cock (which are "humans" but retards that don't know Genshin lore relate them to beast because of no doubt racism towards lesser developed races) she's all of sudden drawing bestiality. There was a Pokemon piece she did a long time ago relating to Pignite and one of the female MCs, but I hardly think that's the piece you're generalizing all of her content over.
2) Rape? Very common theme. Does all the time. Probably should do more of it because I love seeing people whine about her doing it. I get off on the sensitivity of others, sometimes.
3) Incest is implied with Lumine. Afaik, there's maybe 1 or 2 actual pieces where penetration is involved, but really it's one-sided and it's more an absurd parody of brocons. There's plenty of actual incest pieces in other franchises that hold more water then a "incest relationship" where Aether actively avoids his own sister because of fucked up he thinks her love for him is (which is very clear by all the panels with Lumine and Aether in them).
Really surprised of all the themes being crucififed it's these ones. I thought the Parody content around QoS and QoH would hit some rounds along with and tendencies to parody other shit that's a bit more nuance, but sure. Let's overexaggerate some shit. (Also, Nyantcha being a P.O.C woman and doing all this variety makes all of these even more great to see)