Any android device that was released since Android 10 can take a GSI image. I know a galaxy tab 8 can run the GSI from Andy Yan based on testimonials. I will eventually install it on mine. I have it on my galaxy tab 10.1 2019 and I added MicroG. I’ve been running that for over 2 years.
I don’t knowvwhat mtls is, but Joplin has mostvof what you want. It does not have card layout native, but there might be a plugin for that.