Hello! That's normal, Wattman is another software from AMD. You have Adrenalin 2020 or 2019, but to be sure go on "Settings" then "system" and click on "more detail". Can you see such things?
Anyway, thanks to Adrenalin you can also do some tuning, just go on "performance" and then on "tunning".
But I think it will not resolve your problem of black flickering. It's a very common bug. Is this a new build? If not, were you using a NVIDA GPU before? If yes, it can be the problem, try "DDU" (display driver uninstaller). But also verify if windows / all drivers are updated.
Good luck! (: