Agree with @Imbrocator and @McMumster and others...seems a very logical thing to consider? If you're not dating for FWB or intentionally living separately then blending lives is the natural outcome to consider for men and women.
If you meet someone super young or at university and grow together, it's different from starting to date someone from fresh who may be a bit more set in their ways (as are you).
Your home environment is important, your "social style" and tastes and what you choose to spend your money and time on are important (whether it's a cleaner or cleaning or just checking out of your home environment apart from to eat and sleep).
I like a frugal minimalist look, although I'm not super super domestic. A big pleasure in my life is sitting down in a clear flat with everything put away and a "hygge" atmosphere.
Clear sink and kitchen before bed most nights. Definitely not immaculate or a show home but it's calming.
If you continue dating longer term presumably you end up hanging out at home a lot.
I dated a very attractive and attentive guy who thought if we were hanging out at his, we'd just work round clutter.
He definitely wasn't living in squalor or a major hoarder (regular cleaner) it was a nice flat, but I wouldn't have wanted to live with him without addressing the issue. He wanted to see me happy, but he clearly just had different habits.
I stayed over after he'd hosted a house party and he simply hadn't thought to do any clearing or tidying (I did insist he did it but maybe not our finest moment).
It's actually sexist to assume that a man will give a woman control of the home environment at some point if they blend lives.
As pps say it may be a transitional thing or he may be happy to take the lead from a live in girlfriend. So I'd talk to him about it if you REALLY like him enough. He may be amenable to having a clear out or a home makeover.