After reading so many previous answers, plus a little bit of my own experience. I have discovered an interesting phenomenon: if the party who breaks up with the relationship is just because they are inappropriate and the other party does not have any cheating or other bottom-line behavior, then most of the photos will be kept. Just like most of the answers, after all, I have loved before and it is also a part of the "past" in my long life. Just keep it at the bottom of the box and recall it when you see it occasionally, that's all.
This view is mostly applicable to both parties who break up peacefully. Of course, the premise is that no bloody behavior occurred, it is just because it is inappropriate, and everyone is better off if they separate.
However, if it is the party who was broken up, most likely they will not miss it and delete the photos. Because the word "peace" is missing from the breakup and the breakup is not the original intention of this party, a unilateral breakup will often hurt the party being broken up and make it hateful. When time slowly fades away, there will be no nostalgia.
Well, I am the former, but I don’t want my ex to be the latter, although she should have deleted all my photos. We have been separated for 4 months. I am busy with work and have hardly made friends (except for the occasional check on the dating app). I still think of the beauty we had together and the growth she brought to me.
I have become an emotionally better version of myself because of my past with her, and I hope she will too.