Closed to some or closed to all?
For instance: Geo-Location blocking can simulate closed but in reality be somewhat still open.
Anyhow, you can check the certificate transparency logs to see if indeed there was a new cert issued.
[if you used the staging environment then only your logs can show what transpired]
This was against production.
And crt.sh | pqr.neroth.org shows a valid cert was created on 2019.01.22
Yet this doesn't say much about how the cert was obtained (via http, https, dns, using smoke signals, …)
So it doesn't really help much to answer your topic question...
Unless you can see exactly how it was authenticated in the logs.