Some people were looking for less pozzed mod hosting sites than places like Nexus Mods. I came across this place:
I haven't gone through everything there but it does have, for example, "Hogwarts Legacy, Historically accurate 1800's Hogwarts," "WoW Wrath Classic Gender Icons," and FO4 Grounded Commonwealth.
If and when Starfield starts getting modded I am sure you can imagine what it will host.
The problem with that is, modding is often easier than creating the code from scratch. Adjusting code and then troubleshooting what it breaks is leagues simpler than actually doing it.
Not to discredit the skills and great shit they are able to put out, but you'd likely filter out 99% of mod creators immediately by asking for original creation over modification.