Android keyboeards are one of those extremely important topics that seem to get forgotten. It doesn't matter what super secure privacy all you use, if your keyboard is made by google or has a keylogger
just been testing it a few minutes but so far I'm more accurate and less stressed out using https://github.com/Helium314/HeliBoard over FUTO.
I'm sad to say that all the open source and privacy respecting keyboards are still worse than Gboard, but I don't want to use that damn thing. even with network permissions turned off I don't trust it.
Discussion
gboard with all permissions removed is probably okay. but I like to make it hard for myself