To clarify: The Deluxe edition includes all four seasons for year four of Destiny 2. You first say that you were gifted the Deluxe, but then state that your Steam record shows Beyond Light + Season, which only includes a single season. It sounds like you’re clicking on the node beside Europa in the Director map. That node is merely an ad for the optional Deluxe edition upgrade. To access the Beyond Light campaign, you need to travel to the Europa surface, and speak with Variks. If Variks does not have the next quest step for you, then you’ll want to check the Quest terminal in the Tower, to the left of the Postmaster.