The Software Update tab shows all pertinent software updates for the particular device. The URL for this tab is: https://my.server.address/devices/<fw_device_id>/updates
Using this tab is an excellent way to see any missing patches for a particular device, which gives us a sense of the device's relative health.
Note that the updates that are shown will be any updates not yet applied, as well as updates deployed through FileWave that still have an association remaining. Examples shown below for macOS, Windows, and iPadOS respectively.
Clicking on the "Install" button to the right of any update will associate that update to this particular device. A subsequent model update will make that change effective. While that association exists, you'll see a status for the particular update.