After some testing with older and newer games, I found out those features work in all window modes if one setting is turned on in conjunction with Radeon Enhanced Sync and Radeon Chill. That one setting is the AMD In-Game Overlay with metrics turned on. Must be some kind of bug that AMD has overlooked.
I'll just continue using the video games in-game Vsync for the time being until AMD has a fix for those features sometime in the future maybe.
Windows 11 Home 23H2, ASUS B550 F Gaming, Ryzen 9 5900X, Radeon RX 7800 XT, G.Skill Trident Z 3200 16GB, Corsair RM750x