I think it’ll be fine. I use bitwig in kde neon, and it works fine. I can’t imagine Ubuntu studio is going to be that crazy different.

Whatever distro they go with, be sure that it has pipewire out of the box rather than pulseaudio. Pulse is garbage and unusable for anything requiring low latency. Also make sure they know that they need to become incredibly familiar with their DAWs built in tools, since native VST compatibility with Linux is not very common.