https://ubuntu-mate.org/ https://ubuntu-mate.org/ has been available for Pi 2+3 for awhile. Not sure if it's available for Pi 4 yet. Edit: Kali linux does work

https://ubuntu-mate.org/ https://ubuntu-mate.org/ has been available for Pi 2+3 for awhile. Not sure if it's available for Pi 4 yet. Edit: Kali linux does work fine on a Pi 4 though.