Advice please

My husband and I have been married for almost 3 years and we have a total of 6 kids. He had two before we met and I had one and we have 3 together. I know that I shouldn’t let social media cause problems but it has on my end of things. My husband has never posted about me or my daughter or our 3 boys. He only ever posts about his two children (my stepchildren). Maybe I’m reading too much into it but it really has been upsetting me and I don’t know how to bring it up to him. Should I even bring it up? I don’t know what to do at this point. This has been going on our entire relationship, even before we got married and every time it makes me more upset and makes me feel like me and my children aren’t good enough for him to share with the world. What do I do?