Hi,
1,To grant a user or a group to create the DFS-Replication group, we can do this through the DFS management console:
Open DFS Management
Right click Replication as following:
Then click add, type the username, or group you want to grant the create replication group permission as following:
Then click apply.
2,Or you can delegate DFS replication through the ADUC,
Start Active Directory Users and Computers.
Right-click the Domain\System\DFSR-GlobalSettings node, and then click Properties.
Click the Security tab, and then click Advanced.
Grant the desired users or groups the Create All Child objects permission, and then select This object only in the Apply onto area.
For more delegation details, you can refer to:
https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/delegating-dfs-replication