I just mentioned this in a comment, but thought it might be helpful for a larger audience. I’m not affiliated with these people, but I would really really like a smaller Android phone. They also seem motivated to try and make something happen.
Might want to look into Unihertz. Specifically: https://www.unihertz.com/products/jelly-star
3 inch screen.
I own a Jelly 2 and really like it to play around with. However, I find it too small as a daily driver, when I tried that for two weeks. Due to the small size, it is also really bulky, so instead of a tablet, you have a bump in your pocket. For me, the perfect size is around 4,5-5" (minus the keyboard of the titan slim). The Tank Mini 1 has a good screen size, but again is really thick.