Bought a game on Xbox One but cannot play it and I have game pass essential

no they cannot, if you don't purchase halo then when you start the game only the multiplayer part will be installed and you can play multiplayer free, if you bought the game then when you load up you can select campaign or multiplayer. it is still one game essentially.

cannot be done, also the person would have to be playing on xbox to activate the battle pass, on pc it has to be bought from epic store or within game.

It depends on what Game Pass it is. If it's PS Game Pass or Game Pass Ultimate, you can use it on a PC without an Xbox.

Game Pass is essentially Netflix but for gaming. It gives you access to a library of games you can play without having to purchase them individually.

I have never purchased game pass but was still able to get the game through that and could still play it without game pass. Can a game pass bought on one account on the xbox be shared with another account on the same xbox?

Re-post to this. I had 2 Xbox accounts, one being my brothers, and the other being mine. I paid my brother for his account, because it had DLC, and other games, and he no longer played Xbox. I am wondering if there is a way to make it so I can have the games
that he bought, without having to log out of my account to access his account.

P.S I cannot play on his account, because his payment options and information is on there, and doesn't want me to use it, so transferring games to my account is essential.