I don’t think so. A lot of the AMD drivers/firmware have been opensourced and upstreamed in the Linux kernel.
Both. It looks like they have an AppImage on their website which should run fine on Clear Linux if you download it. See this post Some way to install rawtherapee - #5 by ahkok . I’m sure the native rawtherapee package will get updated imminently but you can also feel free flag it for us on GitHub to make sure it’s on our radar: Sign in to GitHub · GitHub