German characters on US-International keyboard layout

I'm used to a German keyboard layout, but want to try using a US-International keyboard to simplify programming.

On Windows 10 I can enter German umlauts (äöü) using the US-International layout (for the normal US layout this does not work) by pressing " followed by aou, but how to enter the ß (sharp s)? "s does not work. I want to avoid switching to the German layout or using Alt-sequences.

AltGr+s. You could get help in Windows Keyboard Layouts, in particular at United States-International (with AltGr pressed):

How do I enter the ß (sharp s)?

ß Right Alts Esszett (sz ligature)

Source Help with Microsoft Keyboards US-International | School of Languages, Cultures, and Race | Washington State University

Personally i use this layout https://eurkey.steffen.bruentjen.eu/

It's basically the US layout with all of the umlauts (and anything else) you might need.

äöüß would be AltGr + a/o/u/s.