Using aptitude, which is another interface to Apt, allows you to see which package would be responsible for this.
aptitude why rygel
In the case of a fresh 19.10 (minimal) install:
i ubuntu-mate-desktop Recommends indicator-sound
i A indicator-sound Recommends unity-control-center | gnome-control-center | pavucontrol | mate-media
p gnome-control-center Recommends rygel | rygel-tracker
The legend is:
i - Installed
A - Automatically installed
p - Purged (not installed on the system)
So, the only possible way from a clean install is if gnome-control-center was installed (or a recent update now depends on this package), Using the command on your system will reveal what depends on the package.
Sometimes installing packages with "recommends" might install them as well.