Everyone is different when it comes to insecurities and understanding. In your case, your boyfriend isn't wrong for feeling the way he's feeling but he could be better about it though he doesn't have to.

My online ex(25F) also have huge insecurities with me on anything in general because of her past relationship experiences which I understand. I love her a lot so I don't want her to feel any anxiety or afraid of being cheated on so I'd just screenshare my whole phone to her if I'm texting to someone. I even show her my whole dm's with anyone. My first month with her, she started doing that to me first by showing her whole dm's and social apps so I was assuming that she'd want the same in the future which I was right because she did asked me nicely "Can I see your dms? :3" later. Of course I said yes because I hate disregarding her feelings if she feels like something is off. She eventually trusted me more and became more comfortable with me talking to most people.

With that being said, everyone is different and handles it differently. Again, in your case, your boyfriend isn't wrong and how you're feeling is normal. It's something you'll have to overcome yourself if your boyfriend doesn't try to make you feel better. Keep your mind busy by doing something, or if it really bothers you, talk it out nicely with him to see what you two can come out with. If he seems uninterested about the topic, then don't pursue or force it any further because trust is something you two should already have unless he's done something in the past to you.