MTA-STS not loading

[Elm4718]

I wonder if part of it is I don’t have _smtp records, acccording to this thread

[SOLVED] V0.50 MTA-STS policy is missing: STSFetchResult.NONE

A missing MTA-STS policy won’t affect incoming mail compared to the previous version of Mail-in-a-Box but indicates that the new MTA-STS record (which adds security for incoming mail) isn’t present. This might be a normal DNS propagation issue. Or maybe after an upgrade we don’t immediately publish updated DNS records. Can you report back tomorrow if the error is still there?

My admin page does nto generate these records in the External DNS page. I’m not sure what I am missing.