Setting up multisite values causes blocked state with message "Services not running that should be: ceph-radosgw@rgw..."

In a RGW Multisite deployment, secondary site rgw service stops and fails to restart.

Multisite Configuration values used as follows:

juju config ceph-radosgw realm="demo_realm"
juju config ceph-radosgw zonegroup="demo_zg"
juju config ceph-radosgw zone="demo_sz"

A look at the ceph log shows that the system fails to find the --default zonegroup.
>
2022-08-19T14:57:43.056+0000 7f29ee596e40 0 deferred set uid:gid to 64045:64045 (ceph:ceph)
2022-08-19T14:57:43.056+0000 7f29ee596e40 0 ceph version 17.2.0 (43e2e60a7559d3f46c9d53f1ca875fd499a1e35e) quincy (stable), process radosgw, pid 33167
2022-08-19T14:57:43.056+0000 7f29ee596e40 0 framework: beast
2022-08-19T14:57:43.056+0000 7f29ee596e40 0 framework conf key: port, val: 423
2022-08-19T14:57:43.056+0000 7f29ee596e40 1 radosgw_Main not setting numa affinity
2022-08-19T14:57:43.060+0000 7f29ee596e40 1 rgw_d3n: rgw_d3n_l1_local_datacache_enabled=0
2022-08-19T14:57:43.060+0000 7f29ee596e40 1 D3N datacache enabled: 0
2022-08-19T14:57:43.104+0000 7f29ee596e40 0 rgw main: ERROR: could not find zonegroup (demo_zg)
2022-08-19T14:57:43.104+0000 7f29ee596e40 0 rgw main: ERROR: failed to start notify service ((2) No such file or directory
2022-08-19T14:57:43.104+0000 7f29ee596e40 0 rgw main: ERROR: failed to init services (ret=(2) No such file or directory)
2022-08-19T14:57:43.108+0000 7f29ee596e40 -1 Couldn't init storage provider (RADOS)
>

Interestingly, If we query the site for zonegroups, we find that the configured default zonegroup (in our case "demo_zg") is not even created on the site yet.
>
ubuntu@juju-3effcd-zaza-339a902d9c20-3:~$ sudo radosgw-admin --id=rgw.$hn zonegroup list
{
    "default_info": "22608c8b-4dd6-4b4e-9f4e-74309fba15fa",
    "zonegroups": [
        "default"
    ]
}
>

However if we take a look at the ceph.conf file: https://paste.ubuntu.com/p/zcTFZ5Z2GF/
We can confirm that the config values are configured as default.

Thus we can conclude that, ceph.conf overwrite defaults for realm/zonegroup/zone from the charm config values without verifying their existence on the site.