Femdom hypno games basically don't exist from what I've seen, can't say I've pinned down exactly why. For general hypnosis games there's https://mindcontrol.fun/wiki/Category:Games
here's two I'm fond of, both heavy on hypno but it's not the central focus:
Monster Girl Dreams: VN-style RPG, mostly with a succubus in the starting town with a few hypno sessions and the 2nd or 3rd dungeon
Avarice Dungeon: Slay the Spire-like but you don't get much time for deck-crafting. However, the enemies are all femdom and do thematic negative effects that make the gameplay great. The bubble blowing girl (pop go your thoughts) still lingers on my mind.