DLC useabl from one account to another account on the same Xbox one

So I have spent almost $100 on DLC from my account on FH2. I wanted to share the DLC that I have onto my little brother’s account ON THE SAME XBOX ONE. Not onto another console, it’s the same console my account and DLC is saved on. I was told my a representative from Microsoft/Xbox that with his account on your family sharing should allow for the DLC from Forza to be played on his account as well, but it is not showing up for him to use. I also checked to see the car packs for purchase and it has said they have been purchased, but will not show up for use when he is on his profile. Is this possible to do or not? Kinda frustrated that he can’t drive the sweet cars I bought even though it’s saved on the same hard drive.

I have 2 accounts running forza on 1 box,main account purchased DLC and got the cars for free ingame,second account has to buy them for credits ingame… Only the account you bought a pack from gets the cars for free.