On webtoon: no sexual content whatsoever. Don't even risk having a page where they talk sexually with their clothes on, much less one with censored intercourse. Their site doesn't allow it.
Tapas: sexual intercourse alllowed as long as you censor the dicks, any penetration and sexually displayed anuses and vaginas.
Patreon: uncensored sexual content allowed as long as the characters aren't minors and it doesn't feature incest, bestiality or to some extent rape (this last one is apparently very much up to patreon's own interpretation just what is and isn't allowed)
So basically, make the comic how you want it. Upload the original version on patreon. Must be patreon-only (if you upload adult content as an official post patreon can and probably will strike down on your account). Your patreon account must be marked as an 18+ page. Bear in mind this means you vanish from patreon's internal search engine, so make sure the link to your patreon is easy for people to find on the other sites where you upload.
Upload the full but censored version on tapas.
Upload a version of the comic that has the nsfw pages COMPLETELY REMOVED on webtoon. Leave a notification image on the relevant posts informing readers that the missing pages can be read for free on tapas.