Idea to skip initial copy of logical replication by using a backup taken by continuous archiving. The original idea is from this post.

Steps

Note: This is just an idea and not tested yet.

1. create a publication and a replication slot
2. create a backup by continuous archiving (pg_basebackup + WAL archiving)
3. restore the DB by Point-In-Time Recovery
   • check the latest LSN
   • SELECT pg_current_wal_lsn();
4. create a subscription without a replication slot
   • With options copy_data = false, create_slot = false, enabled = false
5. advance the replication slot to sync with the subscriber
   • pg_replication_origin_advance
6. enable the subscription and drain WALs