A simple but useful script (grab it here!) to calculate + render the average FPS (and frame delta/ms).
Pre-configured to "just work" (attach it to a GameObject), but you can customize as needed.
Versatile, simple to use, and features support for TextMesh Pro.
2023-05-01.23-30-43.mp4
Commented w/ self-explanatory code...
Do whatever you want with this.