Monster hunter World iceborne on several profiles?

I would like to buy MHW Iceborne for the ps4. Since my brother plays the game too, I wonder if he can play that on his user as well because this is an extension dlc and not a real game. Has anyone of you had the same situation?

You can have 3 scores.

Thanks, but I did not mean that. I have a completely different account with my progress, and my brother has one with his and he wants to keep playing and not open a new one.

Unfortunately, you can't