If you only want the Game Bar to show the FPS, click the Performance options button at the top and uncheck CPU, GPU, VRAM, and RAM.

Want to see your frames per second while gaming? Here's how to turn on in-game settings and enable monitoring programs to ...

These games aren't that graphically demanding, especially for my RTX 4090. So, I upgraded to the Ryzen 7 5800X3D, which increased my GPU usage and boosted my FPS by 30-40% across these titles.