Storage engines like Myrocks do not support gap locks and thus cannot use SBR and pt-table-checksum. In order to compare tables between 2 servers with a direct replication link, we can use replication aligned consistent snapshot.  This modified script has a new switch, "--repl-snapshot" that goes through the steps of establishing a replication aligned consistent snapshot between a source and a replica.  It has been tested successfully on 8.0.31.  A typical invocation would be:

The first DSN is the source and the 2nd the replica.