$ sudo apt list --upgradable
Listing... Done
flatpak-builder/byzantium-security 1.0.12-1+deb11u1 amd64 [upgradable from: 1.0.12-1]
N: There is 1 additional version. Please use the '-a' switch to see it
$ sudo apt list --upgradable -a
Listing... Done
flatpak-builder/testing 1.2.2-2 amd64
flatpak-builder/byzantium-security 1.0.12-1+deb11u1 amd64 [upgradable from: 1.0.12-1]
flatpak-builder/byzantium,now 1.0.12-1 amd64 [installed,upgradable to: 1.0.12-1+deb11u1]

$ sudo apt upgrade flatpak-builder
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 flatpak-builder : Depends: gir1.2-flatpak-1.0 (>= 1.10.7~) but 1.10.5-0+deb11u1 is to be installed
                   Depends: flatpak (>= 1.10.7~) but 1.10.5-0+deb11u1 is to be installed
E: Broken packages
$