Mainly it’s the Nacon WRC games. 7, 8, 9, 10, Generations, none of them work in Linux with Moza. The games just have poor wheel detection. Not much to be done for now, even lawstorant (Boxflat developer, the Moza software for Linux) apparently keeps a windows partition to play those.
A few other minor issues as well. AMS2 works, but I have to configure the wheel manually in-game every time I want to play it. And RallySimFans RBR works great, but updating it is a nightmare with Lutris, it’s literally easier to fully uninstall and reinstall when there’s an update.