Just spitballing ...

maybe we end up with a bunch of icons and users choosing which ones they want to always appear below posts to take action and having access to the others in some menu system.

And maybe assigned by mode. Eg..

The "Standard" or "Default" mode being what we have now

When I'm using my configured "Instazap" mode, I may not want the icons to quote reply or reply, or reaction, and just my first N preset lightning amounts.

The ... More note actions menu can always provide access to all types