Yeah, let me just quote the official package description:
https://packages.debian.org/bookworm/libgdk-pixbuf2.0-0
This transitional package depends on the main library libgdk-pixbuf-2.0-0 and the deprecated Xlib integration library libgdk-pixbuf-xlib-2.0-0.
Packages that only require the main library should depend on libgdk-pixbuf-2.0-0 | libgdk-pixbuf2.0-0.
Packages that require the Xlib integration should port away from it, or until that can be done, depend on libgdk-pixbuf-xlib-2.0-0 | libgdk-pixbuf2.0-0.
Also note the URL points to a Bookworm (now oldstable) version of this package.
At the time I write this, there’s no such package in Trixie (stable):
So how about you guys follow the quoted recommendation and replace the transitional package dependency with a package that actually still exists in Debian stable?
Also, after applying the workaround described by @Debianist above and correcting the deb control file, package install still fails bevause a missing dependencies:
libglib2.0-0 (>= 2.39.4)
This package does not exist in Trixie - it seems to have been replaced by either oflibglib2.0-0t64 / libglib2.0-0t64:i386 packages.
libgtk-3-0 (>= 3.18.9)
This package does not exist in Trixie - it seems to have been replaced by the libgtk-3-0t64 package.
Fixing these dependencies in the same manner as proposed by @Debianist seems to be a propert workaround.