For now I didn't find anything that really works better than using termux on android or echo on ipad, ssh into my desktop with tailscale where I have a tmux session I can attach to. "Input" seems to be the biggest struggle for me versus a normal desktop+keyboard setup. On ipad I use a nuphy bluetooth keyboard which works pretty well and on android I use FUTO Keyboard with voice input.

Overall I think I don't even want to start coding too much on the go with a setup like this but it's nice to have options :)