That el7 package has description:
yum Configs and basic docs for Software Collections as delivered via the CentOS SCLo SIG
The Software Collections was a method introduced by Red Hat to add versions of applications (language, database, etc) that were not in RHEL 7 (and 6). For example, the GCC in EL7 is 4.8.5 a whole decade and recently you really want to use something more recent. Hence SCL did offer “Developer Toolsets” that can be co-installed. The latest has GCC 11.
With RHEL 8 Red Hat did something entirely different; DNF – the python3 based “yum” – has “modules” that allows “streams”, and RHEL 8 (and thus Alma 8) has “AppStream” repo full of streams. See Red Hat Enterprise Linux Application Streams Life Cycle - Red Hat Customer Portal
In other words, the centos-release-scl was a “third-party” repo and Alma basically has equivalent content in base repos. Not everything, naturally. Depends on what “extra” you did need from SCL.