:~$ sudo apt update && sudo apt upgrade
...
1 package can be upgraded. Run 'apt list --upgradable' to see it.
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
  libayatana-appindicator3-1
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
:~$ sudo apt list --upgradable -a
Listing... Done
libayatana-appindicator3-1/testing 0.5.91-1 amd64
libayatana-appindicator3-1/byzantium 0.5.5-2+deb11u2 amd64 [upgradable from: 0.5.5-2]
libayatana-appindicator3-1/now 0.5.5-2 amd64 [installed,upgradable to: 0.5.5-2+deb11u2]

:~$ sudo apt upgrade libayatana-appindicator3-1/byzantium
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Selected version '0.5.5-2+deb11u2' (None:10/byzantium [amd64]) for 'libayatana-appindicator3-1'
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:
 gir1.2-appindicator3-0.1 : Depends: libappindicator3-1 (>= 0.4.90)
E: Broken packages
:~$