I’m really sorry, but I didn’t understand any of that, and none of the documentation links you attached say anything about GitHub or repositories. Here is the ignore list:
Binaries
DerivedDataCache
Intermediate
Saved
.vscode
.vs
*.VC.db
*.opensdf
*.opendb
*.sdf
*.suo
*.xcodeproj
*.xcworkspace
I don’t have a clue what a single thing on that list is. It’s the list that UE5 generated automatically. The only change is that I removed the .sln file, but when that gets pushed, it’s completely empty
EDIT: I’m also apparently supposed to be able to check out assets, but that option doesn’t appear. Clearly I’ve set this up all wrong, but I’ve been following tutorials and I imagine they don’t have these problems