After migration, you must add any missing custom data center locations to the Location drop-down menu.
After migration to vRealize Automation 7.3, the data center locations in the Location drop-down menu on the Compute Resources page revert to the default list. Although custom data center locations are missing, all compute resource configurations migrate successfully and the Vrm.DataCenter.Location property is not affected. You can still add custom data center locations to the Location menu.
Migrate to vRealize Automation 7.3.