I can answer most of it. Yes its still being made. Yes the Patreon page is down, however there is a different page https://www.patreon.com/Futa_Fantasy/posts (this one) that has more information and has posts made about the progress of the game up until now. The last post was only like a week ago so the game is NOT dead. However, it might be dead on Itch if the creator just didn't wanna update it on Itch, or if they are just waiting for something.
Unfortunately no. You are right that the patreon page seems to not exist anymore, and it doesnt appear on my Patreon account feed either. This must be a recent development.
I can say, that as of late the creator has not been going through the easiest time with the game. Lots of things not going how it was planned. The creator might have shut down the patron page to "silence" it for a time but im not in the know beyond what was on Patreon