FRITZ!OS version sensor in AVM FRITZ!Box Tools integration

That’s how it looks to me, yes. Mine has now reverted to null after doing the update:

installed_version: 154.07.28
'latest_available_version:': ''
friendly_name: FRITZ!Box 7590 Firmware Update
device_class: update

Interesting though that the current version info hasn’t updated yet…

Will make a note of the colon fix as it will need an update to the automation for the next HASS update.