I've ordered a "Galaxy Tab S5e (2019)", but I won't be able to personally verify that it works with the Fly app until I receive it and unwrap my Mini on Christmas. It's not on DJI's list, but I've read posts by a couple people which claim it works well. It appears to me that the more recent Galaxy Tabs have a pretty good success rate with the app. (Not all of them, though!)
The Galaxy Tab S5e is a lightweight (400 g -- 14.11 oz) Android tablet with a 10.5 inch OLED screen. It supports several of the "GPS" services. (A-GPS, GLONASS, BDS, GALILEO) 4GB of memory. WiFi only. 450 nits of screen brightness. It cost me US$319 for a used/returned/refurb'd one from Amazon.
We shall see. If it doesn't work (it does), I'll probably return it and get an iPad Mini 5. Or maybe one of the cheaper 10-inch iPads.... I'll cross that bridge if I come to it. (It didn't come to that.)
EDIT: I have received my Galaxy Tab S5e. I was able install the DJI Fly app via the Google Play store. I was able to log into the app and get to the page where you are instructed to connect to the drone. I can't do that since my drone is still under my Christmas tree, but so far <knock on wood> the hardware and software are coexisting peacefully. I'll update again when (and if) I'm able to connect to my Mini.
SECOND EDIT: Merry Christmas everyone! I can now confirm that the wifi-only version of the Galaxy Tab S5e works great with the Mavic Mini. I haven't flow yet, but I was able to connect, view the camera feed, and calibrate the compass. While I'm here, I can confirm that the Google Nexus 5X does not work with the Mini. While its hardware/software stack is fully 64-bit, it only has 2GB of memory, so that's likely the issue.