And again, as I always try to do, here's the (rough, basic, unfiltered) HOWTO on what I did to get Kopia with garage up and running in my homelab. (don't worry, the keys and secrets have already been rotated)
https://codeberg.org/jwildeboer/gists/src/branch/main/2025/20251227-Kopia-Garage-Backup-Mac.md