At long last.
I’m really sad Apple still forbids shipping apps with a JIT, but we are so close to having a usable Linux sandbox on an iPad that I will take whatever I can get.
Update: After some experimentation with a Debian 11
arm64
image, I have to rate this as merely borderline usable. Just logging in to XFCE and doing anapt upgrade
melted off over 15% of battery on my iPad Pro M1, which makes it impractical for anything resembling real development. Also, UTM removed the Mac OS 9.2.1 image from their gallery (another big reason why I wanted to run UTM), quite likely to avoid issues with Apple. In short, I’m going to keep using a Linux sidecar.