Hello,
I don't have an iPhone with an action button but I use the double tap feature and the shortcuts.app to create an
"F✱N Action Menu".
It's my initial setup but I want to share this idea with you to develop it further.
Shortcut
(Please note that the shortcut refers to other shortcuts)
Another option of the "menu-option" in the shortcut.app is here:
https://forum.myforevernotes.com/d/233-shortcut-open-productivity-apps-in-notesapp
