Depends on what you mean by "community". There used to be a repository named "community", it is now called "extra" and it is indeed an official repository.
It is maintained by a group of trusted users who need to be sponsored by at least two other maintainers. This creates a web of trust rooted at the Arch Linux developers.
The Arch User Repository is what I consider to be a "community" repository. It is essentially the programming language package manager model. You create an account and push whatever packagers you want.
https://wiki.archlinux.org/title/Official_repositories
It is maintained by a group of trusted users who need to be sponsored by at least two other maintainers. This creates a web of trust rooted at the Arch Linux developers.
https://wiki.archlinux.org/title/Package_Maintainers
The Arch User Repository is what I consider to be a "community" repository. It is essentially the programming language package manager model. You create an account and push whatever packagers you want.