After finishing the procedure of migrating authoritative domain controller from windows server 2008 to windows server 2019, the group policies were not replicated to the new server.
Contents of \dc2019sysvolmydomain.localpolicies is empty.
I found a nice video explaining how to trigger initiate replication and fix the issue.
Follow this link: https://www.youtube.com/watch?v=ja53C2Mz1EQ
It really works!