I’m no expert here, but I think we have available what you’re after already.
To list what snap packages I have installed on my current system, I can use
guiverc@d7050-next:~$ snap list
Name Version Rev Tracking Publisher Notes
bare 1.0 5 latest/stable canonicalâś“ base
chromium 116.0.5845.179 2614 latest/stable canonicalâś“ -
core 16-2.60.2 15925 latest/stable canonicalâś“ core
core22 20230801 864 latest/stable canonicalâś“ base
cups 2.4.6-4 980 latest/stable openprintingâś“ -
element-desktop 1.11.36 62 latest/stable ken-vandine✪ -
firefox 117.0-2 3068 latest/stable/… mozilla✓ -
gnome-42-2204 0+git.ff35a85 126 latest/stable/… canonical✓ -
gtk-common-themes 0.1-81-g442e511 1535 latest/stable/… canonical✓ -
snapd 2.60.3 20092 latest/stable canonicalâś“ snapd
telegram-desktop 4.9.5 5002 latest/stable telegram-desktopâś“ -
wethr 1.5.2 56 latest/stable snapcrafters✪ -
where channel is listed.
In the last hour I attempted to install a Ubuntu Desktop mantic daily, if I wanted to know what snap packages were installed by default, I could look at it’s manifest for that ISO (https://cdimage.ubuntu.com/daily-live/20230908.2/mantic-desktop-amd64.manifest - though note this is a daily so this URL will be outdated very soon; but this isn’t the case for released ISOs)
At the end of the manifest the snap packages are listed, for the daily I attempted to install (alas it failed)
snap:core22 stable 864
snap:snapd stable 20092
snap:firefox stable/ubuntu-23.10 3068
snap:gnome-42-2204 stable/ubuntu-23.10 126
snap:bare stable 5
snap:gtk-common-themes stable/ubuntu-23.10 1535
snap:snap-store stable/ubuntu-23.10 1036
snap:snapd-desktop-integration stable/ubuntu-23.10 83
snap:ubuntu-desktop-installer stable/ubuntu-23.10 1229
Is this what you’re after? Or have I missed your point completely? (sorry if that’s the case).