I managed to get Sketchup 2025 to work on Linux, with Steam and Proton. I will write a tutorial in the coming days. Seems to be on par with Sketchup 2017 in terms of “issues”. I am able to model, save, load files. However, I can’t use the new rendering engine. I suppose someone else would be able to chip in.
Edit: This is how I got it to work: How to run SketchUp 2025 on Linux using Steam and GE Proton