Facing the same mental struggel to convert between units when debugging networking issues, I've build a small little Requestly (https://requestly.com/) middleware that just multiplies by 8...
To add to this, I'm trying with hetzner S3 storage and the region "hel1" is not accepted by any inputs (or manually editing via config).
root@pbs:~# proxmox-backup-manager s3 check hetzner 6892495451 --store-prefix /...