vCenter does not show up in VCF Operations -> License Management -> Licenses -> vCenter Systems.
VCF Operations 9.x
VCenter Server 9.x
Integration or privilege issue.
Check integrations and privileges.
You assign a primary license to a vCenter instance. Your other assets that are connected to that vCenter instance, including ESX hosts, are then licensed automatically. After you assign a primary license, you can also assign add-on licenses to license the assets that consume add-on license capacity.