Server 2019 to 2019 DC migration, sysvol dfsr stuck in initial sync

The event logs could not be read so its a little difficult to follow but looks like STONESERVER has tombstoned. I'd check the system and DFS Replication event logs on both to confirm this. If this is the case then STONESERVER will need to be rebuilt from scratch. Roles are already on SRTTEMP so all that's needed is to perform some cleanup to remove the STONESERVER remnants from active directory. 

https://docs.microsoft.com/en-us/windows-server/identity/ad-ds/deploy/ad-ds-metadata-cleanup

https://techcommunity.microsoft.com/t5/itops-talk-blog/step-by-step-manually-removing-a-domain-controller-server/ba-p/280564

Once the cleanup is done run the above again (plus check the system and DFS Replication event logs are clean) to verify domain health is 100% before trying to add the domain controller again. (put up a new set of files up and I'll be happy to look)