As of Postgres 16, it is possible to create logical replication slots on stand-by servers (replicas), which comes in handy for instance for load distribution. I tried connecting to a stand-by replication slot with Debezium 2.4.1.Final, but it failed as the Postgres connector runs two queries which are not supported in recovery mode (i.e. on read replicas).

Gonna file a PR with the fix in a bit.