Hi there! Season Pass level from the previous season does not grant entitlements for the next season. Players who own the Deluxe Editions of Shadowkeep, or purchased Shadowkeep after the launch of Season of Arrivals, had access to the season pass immediately. Looking at your profile through the game API, it does not appear that you own the items associated with the Deluxe Edition. You will need to purchase the season pass for this season.