It’s been over 60 days since I got my first certificate and set up automatic renewal. Since the certificate was for 90 days and the renewal is supposed to happen when there’s less than 30 days left, it should have happened.
I went to https://www.engelke.com, opened Chrome’s Dev Tools and went to the Security tab and clicked View Certificate:
And there it is! It renewed for another 90 days with no action on my part. I’m all set up (remembering that I’ll need to patch my server with security updates at times).