I'm in quite a few social situations where this happens, was speaking to a friend about it and it happened to her today.
She was with her partner's brother and wife, they didn't ask a single question about my friend and her husband (the brother). And gave minimal responses when they spoke. Only wanted to speak about themselves.
I always find it so alien. If I'm with someone, friend or even someone I barely know, I'll always ask about their news and do my best to be engaged with what they say. I can't imagine just not saying anything when they speak, or turning it back to myself.
My dad does this too, if i tell him something, he doesn't engage with what I say he just turns it back to him and we have a conversation about him again.
It's really frustrating.