Assign ß on MacBook or external Magic Keyboard to long pressing S On Mac OS 10.15.4, when long-pressing keys such as E, O etc., we can chose from a small menu displaying several options for that letter.

I am searching for a possibility to write the letter ß in the same way. I know I can type "option + S", but this is not what I want

Question:

Is there a way to assign ß to an option menu that appears when long pressing the letter S (similar to ling pressing letters such as E, O, U etc.)? 

Thanks a lot!

Edit after comments:  


I have a MacBook Pro with a Dutch keyboard layout.
Language &amp; Region settings: Preferred languages = English (US); Region = United States
The easiest fix is to just switch to the US or ABC input source.  These have the same mapping as Dutch, but with more press/hold options.

If you want to customize the Dutch input source, see this: