How do I make my ex boyfriend get rid of photos of me?

I, 17F, and my ex boyfriend, 17M, were in a relationship for 3 months. Obviously, it wasn’t that long, but it was the worst months of my life and I’m still hurt by it. He was extremely possessive, controlling, and obsessive. If I even talked to another male id be accused of cheating. He would defend himself for making these accusations by offering up his phone and letting me look through it, which I never did because I don’t believe in that, I believe relationships are built on trust. He was also extremely bipolar or something else, during arguments he’d go from yelling at me to begging for forgiveness, then acting like he didn’t care in the span of one minute. Also, this was my first intimate relationship. I had a very rough childhood being exposed to sex at a young age, and was never comfortable, even ashamed of my own feelings, in that matter. He was the first guy I ever gave myself too, and it took a lot for me to be that vulnerable. I broke up with him after a realization of how toxic it all was, I had gone to the hospital for SH and he only talked about the argument previously where I had “cheated” (messaged someone who worked at Little Caesars asking why the stores were so bad now) and “hurt him” , it took him two days and me specifically pointing it out for him to say he felt bad for me and hoped I’d get better. A week after the breakup, his friends girlfriend informed me that he had already gotten back with his ex of 2 years and that “she was the one”. This was the same ex he told me he was over and even cried when I asked him if he still loved her saying he didn’t. This obviously hurt, my whole relationship was just some act to make his ex jealous. Not only that, I logged onto his snapchat profile that I still had access to after he used it when he left his phone behind to sneak out of his parents house. I found plenty of photos of every girl he’d ever dated or been with, including still having photos of me. I deleted them off his Snapchat but couldn’t access his “my eyes only” photos, or actually take them off his phone. I also found multiple girls he had been snapping while we were together, and that the night I went to prom with him (before we became official), he was going to ditch me at the dance and take another girl to the after party.
I still can’t get let myself get over it all knowing he probably kept all the photos of me (none were too explicit but he had photos of me sleeping next to him after intimate moments) , I genuinely am disgusted and wonder if there is anything I can do to make sure he deletes these photos, he already told his mom that I was in the wrong but I’m wondering if I should try to ask her anyway. Advice?