P: Display a "Has been printed" notification

Moderators, @Rikk Flohr: Photography, please merge with this existing Idea:

https://community.adobe.com/t5/lightroom-classic-ideas/lightroom-a-better-search-find-in-the-library-module-library-filter/idi-p/12249802

(Others in that thread have requested the same functionality.)

"the Develop module History records when a photo is printed, exported, etc. I'm not sure whether it's searchable though."

Not with built-in commands, but you can search it with the Any Filter plugin (see above).

In addition to develop adjustments, the Develop module History records when a photo is printed, exported, etc. I'm not sure whether it's searchable though.

While waiting for Adobe to implement this, you could use the Any Filter plugin to filter by the date/time photos were last printed:

[Moved to Lightroom Forum]