More keys to activate a fn layer

[gaunt parcel]

QMK has some nice tricks to activate an fn layer.
The current wooting implementation is similar to MO(n) from keychron.
It's fine, but sometimes a bit complicated.

I'm using an english keyboard as a German user so I have mapped "ä, ü, ö, ß" to "a, u, o, s" which works but I need two finger for one of these letters.
If I could use OSL(n) it would mostly work the same way as before, but if I only press the OSL key it keeps fn activated until the next keypress. So activating "ä" would also need two keypresses but not in the same moment and wherefor can be typed by one finger.

One additional mode I could think of would be a cycle button which works like toggle but goes always activates the next layer.

More keys to activate a fn layer

pressing osl and another key at the same time would behave the same as the default and would not keep the layer active, only pressing osl without another key does keep it acitve until the next keypress of any key.

[hot hearth]

You dont have layer toggle in wootility .... yet

[vestal galleon]

+1 for layer toggle, would be a great to have feature

[lone geyser]

Combine Fn lock and DKS? If I open and lock the Fn layer I can then have a key that does one (or up to 3) key input and on release sends "Fn lock" which unlocks the layer returning to the main one