In vCenter UI when you navigate to Lifecycle Manager > Settings > Patch Setup you see connectivity status as Validating.
vCenter 7.x
vCenter 8.x
When navigating to Lifecycle Manager > Settings > Patch Setup, Validation process will be triggered each time when you access this tab.
Refreshing tab or switching to different tab will trigger the same behavior.
This is expected behavior as status will change to connected after a few minutes.
If connectivity status is still in Validating after 5 minutes please check this article for next steps
VCF Authenticated Downloads Token Troubleshooting Guide