I am referring to this page: https://certbot.eff.org/instructions
You could add a new entry for “Apache” and the System selection list “SLES 15.1” and these would be the commands for the point 2 “Install Certbot” - it’s almost the same like for openSUSE Leap 15.0 apart from the commands which add the packages with
SUSEConnect -p PackageHub/15/x86_64
SUSEConnect -p sle-module-python2/15.1/x86_64
SUSEConnect -p sle-module-public-cloud/15.1/x86_64
zypper install python3-certbot python3-certbot-apache
The other points can remain as they are.