So I’m having an issue to where when playing games like Persona 3 Reload or Anno 1800, I notice my Dell monitor’s brightness flickering a lot. I assume that it has something to do with Variable Refresh Rate as I tried those games out on Windows and don’t have the issue. Has anyone personally experienced this behavior on AMD cards? Currently using KDE, but noticed the same with Gnome, but that’s a different story. 
Hello @Matty!
I had that with Freesync. Turn it off in your Monitor menu.
I figured, but I was hoping that there was a fix 
Yes, I’m sorry. Perhaps another user will find a better solution than this. At least I hope so.
Ya the fix is in. Freesync is being done away with.
I believe that is completely different than VRR like you would use in a game. That looks like something related to multimedia.
As far as I know they are basically the same. There are a lot of terms being used and if it is on HDMI it is Freesync and if it is on DisplayPort they call it Adapative Sync Compatible. Freesync is a form of Variable Refresh Rate.
I also had that issue with my RX 7800 XT in KDE. First, there was flickering in games. After upgrading to KDE 6 all was fine in games, but there was a flickering after leaving games to the desktop. I had to switch Hz temporary and switch it back. Then the flickering on the desktop was gone for this moment. Then I switched to Gnome 46 and enabled experimental VRR feature. It looked fine in games and also on my desktop. There was no flickering. But in Gnome there was a mouse stuttering in full-screen. It took a while before I realized it.
I ended up disabling VRR feature and using VSync setting in games now. In Windows 11 I never had such issues with AMD FreeSync.