When site pairing is viewed from HCX Cloud UI, the remote URL shows as "URL Not Available":
VMware HCX
This is an expected behavior, and this does not cause any functional impact.
When there is unidirectional site pairing (e.g from HCX Connector to HCX Cloud), only the HCX Connector (source), it will display the HCX URL. This information is not visible if you login to HCX Cloud (it will display URL not available).
Create a HCX Bidirectional site pairing to view the URLs for the paired sites from source and target (only available for HCX Cloud to Cloud).
Note: HCX Connector can't receive a site pairing from HCX Cloud.