You can configure acme certs in the scale UI now.
Yes, we know; it was posted just five posts above yours. And it's also a feature in CORE--if you're using one of the two (for SCALE) or one (for CORE) supported DNS providers. As was posted four posts above yours.
It's for either, really; the API is the same in this regard.
It appears that CORE 13.3 will slightly expand the list of supported providers--Cloudflare seems pretty likely, and it sounded like there were one or two others that were going to be added as well. If you're using a supported provider, getting your cert through the GUI may make sense. Though if you're also using FTPS, S3, or WebDAV, or other services that would use a certificate, you may still want to use my script to ensure they all change to use the new cert when it's issued.
I am running CORE and I do not see this ACEM cert in the GUI of 13.0-U6.1
It's in System -> ACME DNS, set up an authenticator there (if you have Route53 DNS, the only one that's supported), and go from there. It's ugly and awkward, but I believe it works.