Partners ex on phone (23M) and I’m (25F). What would you do?

My boyfriend and I have been together for over a year. He’s amazing in every single way. He takes care of me, I hang out with his family and they love me & he provides for both of us. He shows his love always with his actions. We definitely want to get married in afew years. We’re both young 23 & 25. However, there’s one thing that has bothered me for a while and I never had the guts to really say it because I feel like I might be crazy, but please let me know your input.

Before with me, he was with his ex for around 2 years. She broke up with him. He was heartbroken for a long time but then grew out of that eventually and realized that there’s more to life than a girl breaking your heart. Fast forward til now, he never ever talks to her. He doesn’t have her on tiktok but I still see the old conversation is still there but he knows I’m aware of it. I feel secure enough to know he won’t do anything, but it’s the fact that every time we open tiktok dm’s I always have to see her pfp and old convo a few dms down.

I think on his phone he has her labeled as her initial. They do not speak what so ever. He might even have her on Twitter but I don’t think he realizes about that tbh. I just don’t want him to have any of it on his phone. How do I approach him about it? It just hurts my feelings and I don’t want to sound crazy /: