That's the point, you don't have to trust the app. Yank all of it's permissions.
Discussion
Yeah I immediately realized after posting... I'm using Graphene FFS so have no excuse 😁
I disallowed "network permission" seems to be working fine... GIFs don't work because it needs network access but the slide/glide typing is pretty damned good 👌
installed Giphy keyboard... who can I trust more, Giphy or Google?