VPNs / Corporate Networks are not allowed. It will need to be accessed via your actual machine. That RDP server itself is likely not on a residential ISP network.
Are you still showing it with that err_ssl_protocol_error?
That is generally a client side issue.
https://www.thesslstore.com/blog/fix-err-ssl-protocol-error/
You are using an improper SSL certificate.
Log into the hosting control panel:
Account Manager > SSL Certificates > Get Automatic Certificate from ACME Provider
You are misunderstanding how they work, they are not on a per domain basis and never were, those are account wide for your account. They are working correctly.
They are both working normal as expected. Those are account wide features. If there hasn’t been an issue with resources that is what it’s supposed to say that there are no issues.