I'd never really thought about it before, but Enter to advance to the next field field and Ctrl + Enter to submit the whole form (which is the typical keyboard shortcut for submitting the form while a multi-line text input control has focus) does have a certain appeal to it.

What would be 'submit' then?

To me that sounds like the way MacOS avoids Home/End with alternative solutions that kinda work but are not great

(And yes I do miss those - with an external keyboard these get less painful but still don't work 100% like on a PC)