This is my exH and I. When I worked less hours, and we had no children, not a problem. But after changing career (which he pushed for, not foisted on him) and having 2 DC together, I was out of the home a lot longer than him, and yet still doing 90% of the housework, and other than drop offs and pick ups, the rest of the childcare.
I tried everything. We would talk, quick chats, long deep discussions about how disrespected and undervalued I felt. I did chore rotas, I let him cherry pick whatever jobs he fancied, I went on strike, I begged to get in a cleaner...
He would apologise and make an effort, I think 3 months was the longest he lasted. Then it would all just slide back, gradually, with me picking up the slack here and there, until I was doing everything again.
It killed all the love, respect, and attraction I felt for him. Our sex life dwindled to nothing, which he really resented, but there is nothing sexy about a man child who expects women to serve them while they just sit on their ass watching NCIS reruns!
He never changed, why would he? He had no respect for me, or just about any other female tbh. Changing served no purpose, but it did mean a lot more work for him.
Do not marry him OP, at least not without a fundamental shift in your relationship. He needs to step up and work with you, as a team, taking responsibility for his share of maintaining the home you share. And not because you've given him a list of things to do, because that still leaves you ultimately responsible for it all.