Im getting no where near the performance with my RX 560 amd gpu i was getting in windows. I dont thing KAOS is using my GPU. I think its using the one in my cpu. is there a driver I can install or a command to force the use of my gpu on steam games and app like inkscape?

I don't know much about switching drivers but I use an AMD card and I have disabled my onboard video in the BIOS. KaOS installed and used which ever driver just fine. (I don't game on Linux.)
You could try doing that.