How to Update a software package

I use groff with the mom macro package. I installed groff_perl. groff_perl contains the mom macro package.

pdfmom -dVERSION=1 foo
[mom]: Version 2.4

The current version is 2.6_c.

How do I update this package? How often are packages updated, and are they created using the AlmaLinux Build System?

Run dnf up
That installs updates for all packages that do have updates available.

Will that particular package ever receives updates in this version of AlmaLinux?
Perhaps never. AlmaLinux is not a bleeding edge distro.