I've wanted a small android phone for a while now too, but partly because I just don't care much for smartphones and want a small and cheap option. Ideally it'd be a pixel so that it should support GrapheneOS.
The foldables are such an interesting concept. I actually had a Surface Duo for a while (though a different style of foldable) and really liked it, but I only had one after they were a year old and I could try it out with a used phone for ~$200.