I recently updated to 2025.7.3 and was a little bit surprised to see the note that the CUPS integration was being removed.
I didn’t see this in any release note but perhaps I missed it.
Anyways, fyi, I found this GitHub - momentobooth/cups2mqtt: Kinda like other 2MQTT packages but for CUPS, the UNIX printing system and it is working just fine. Not too much work to move over to it for me as I already had MQTT installed, and only one printer.