I need advice from my ladies

So m my husband got a new job recently. Maybe two months ago? He talks about the job quite a bit, but never mentions anything about his office mate (a female, our age). This person is also his only employee. I haven’t thought much of it but I thought I’d hear more little bits of conversation they’d had or if there were good teamwork moments or even bad ones? But he never mentions her. Not once.

I get on his phone this weekend while mine is dead because I needed to make a few calls while mine was charging. It’s very normal for both of us to do this lol. I’m looking through his texts to find a certain name to call because I knew he had just recently texted this person. While I’m looking through, I see like 4-5 group texts.. all with women our age that he apparently works with and by looking through the texts, they all seem like very good friends.. inside jokes and what not. I notice he is the only dude in all these group texts too.

I honestly don’t know how to feel about this. I really don’t care that he has female friends but he seems so close to them - why does he not tell me about them? Not even purposely but running through his day, why not chit chat about all the crap in the group texts and funny mmoments they obviously share? I talk about my moments with my friends that are co workers often with my husband over dinner. It’s normally a part of my daily recap.

My point is that at this point it feels like he is purposely omitting these women from his daily recaps and it just honestly seems like he’s hiding his friendship with each of them. I haven’t even heard of half of their names? Also why is he the only dude? There are other dudes in the surrounding offices? What’s the point in hiding?

I need help explaining to him how I feel. Am I wrong to feel like there’s some hiding going on and wanting to know why? From an outsiders perspective, what do you all think of this?