True, but Bucardo is trigger-based and does not use WAL-based logical replication, and is unmaintained. There is also a world of difference in performance between them.
pgactive has limitations with not supporting DDL, sequence management, column and row filtering, conflict and exception handling, incompatibility with native logical replication, etc. The license is also different (Apache 2.0 for pgactive vs PostgreSQL for Spock). Most importantly, it's not "supported anywhere" by AWS, just on RDS.