If I understand correctly, the main repository is for open-source packages made by Canonical and supported by Canonical and the universe repository is for open-source software made by the Ubuntu community. I found this driver
https://packages.ubuntu.com/focal/rtl8812au-dkms
that's in the universe, but in the changelog (https://changelogs.ubuntu.com/changelogs/pool/universe/r/rtl8812au/rtl8812au_4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.3/changelog)
it's created and updated by Canonical employees (e.g. Tim Gardner, Ricardo Salveti de Araujo).
Why is it then in the universe and not in the main repository?