When you set any hover/click sound for the button, it is not affected by the sound settings (for example Master Volume). I can hear it perfectly even when all of the sounds are turned off.

It should be affected by the Master Volume, and in my opinion, also bound to the UI Volume (since it's an UI thing)
Maybe you would even give the ability to change the Sound Channel like in the Audio elements?
I hope it's gonna get fixed 🙏

Note to myself:

Tried in 1.21.1 and it worked fine there, but in 1.21.10 it really does not work, so it's very possible this is actually a bug in Melody and not FancyMenu.

As I thought, this was actually a bug in Melody and it is now fixed in Melody v1.0.14 :)