Succint changelogs for Debian packages

[jman]

Hi,

I've been using Debian for years and one of the question I've always been afraid to ask is: why are 
Debian changelogs always so succint?

For example, I've just upgraded the package file-roller from 44.3 to 44.4 on my testing (trixie) and 
apt changelog says "New upstream release".
In reality the upstream project has actually resolved 2 annoying bugs I was following on their issue 
tracker.

Is there a workflow or something else I can do to actually get an actual summary of upstream 
changes, without jumping through loops trying to reach the upstream project itself? Ideally this is 
something I would like to do when upgrading my Debian packages.

Thanks!