Thanks, that helped me find this which does sound like it:
https://en.wikipedia.org/wiki/Antitrust_cases_against_Google...
Samsung literally provides their own alternative for all of these.
Re:Android 16 Is Here
by diffeomorphism on Wednesday June 11, 2025 @04:48AM
(#44245536)
No, they provide them in addition but not as replacements/defaults. That is what the discussion was about.
Manufacturers were contractually forbidden from doing that.