Hey there,
I have my no-sign-gui tweak set to my sneak key, but there is one thing: Whenever I sneak I get that message - could you maybe add a messsage toggle button to the advanced keybind settings?
Thanks!

This is now implemented as of maruohon/malilib@4b441c3 in the main development code.

Still no idea of a timeline when new builds will start coming out on 1.16.4, but new 1.12.2 builds will probably start soon-ish.