Tried changing the rotational speed the 100 but the speed from the settings is not applied, i could just be slow

I believe I found the issue. It was an issue when you release the mouse button. If you did not release it while hovering the slider, it did not update correctly. Anyway, fixed this in 968abb8

What Minecraft and mod version? Can you try with only Controllable installed too?

sorry should've specified but on the new 1.21 beta 1

Let me get this right, you can still rotate the camera, the setting just doesn't affect the speed?

Yes, the settings does not effect the speed, i wish i could possibly show you via clip, and just make sure i wasn't tweaking i went back on the 1.20 version and the speed settings were fine