The mod simply requires a mod Cloth Config, and the version of this mod is only for 1.20.4 and lower, of course, someone may say that this is not a Dynamic FPS problem, but then the question is: why was this mod for 1.20.5-pre1?

Cloth Config is an optional requirement that allows using the in game config screen, Dynamic FPS can be used without it.
If you'd like to use non-stock settings you can either edit the config file or copy one from a version where Cloth Config is available.

Cloth Config is an optional requirement that allows using the in game config screen, Dynamic FPS can be used without it. If you'd like to use non-stock settings you can either edit the config file or copy one from a version where Cloth Config is available.

Ok, I already understood, everything worked, it’s just that earlier for some reason the mod didn’t work for me, but as soon as I wrote about it, the mod started working for me.. um.. most likely it’s because of my stupidity because I’m probably doing something again got it mixed up

I see, no worries.