Overlay supposedly active (FPS counter working) but not showing and screenshots not working

[Rainfury]

This happens to mostly small games where they might not even have a setting for full screen.

At the top left I'll be able to see Steam's FPS counter. If I End Task for Steamoverlayui.exe, the fps counter disappears.

However, both shift+tab to show steam overlay and F12 to take screenshots won't work.

I tried restarting the game, restarting steam, and even restarting my whole PC (multiple times as I usually just ignore it). Tried toggling the steam overlay button on and off. Can confirm that if the toggle is off that the FPS counter won't show too.

[Rainfury]

For anyone who has this issue too, it might be an issue with rpgmaker and similar games specifically.

Putting
--in-process-gpu
Into the game's launch arguments fixed it for two games I was playing, which I believe are not made in rpgmaker. (one of them confirmed to be made from unity without rpgmaker)