We are facing the same error when upgraded the proxmox to 8.1.3
HEALTH_WARN: 1 pool(s) do not have an application enabled
application not enabled on pool 'scbench'
use 'ceph osd pool application enable <pool-name> <app-name>', where <app-name> is 'cephfs', 'rbd', 'rgw', or freeform for custom...