This didn't work for over a month after release.
There was an issue that when you purchased the game, you instead owned the dlc, the game downloaded but you couldn't start it.
It's finally available and i shows up as owned for me.
I only found out because there was a review on the store, so i checked and found a gamefaqs thread from 2 weeks ago where several people confirmed that it works for them now.
https://gamefaqs.gamespot.com/boards/264564-xbox-series-x/79820694?page=1
There was an issue that when you purchased the game, you instead owned the dlc, the game downloaded but you couldn't start it.
It's finally available and i shows up as owned for me.
I only found out because there was a review on the store, so i checked and found a gamefaqs thread from 2 weeks ago where several people confirmed that it works for them now.
https://gamefaqs.gamespot.com/boards/264564-xbox-series-x/79820694?page=1