True cross-buy for the original was a limited-time program that has largely concluded.
When discussing "cross-buy" for on PlayStation, the situation depends entirely on which game you are playing and which generations you are bridging. While true "cross-buy" (buying once to own on all systems) is rare, Bungie uses Cross-Save and Digital Upgrades to manage your content across PS4 and other platforms. Destiny 2 : PS4 to PS5 (Modern Standard) cross buy ps4 destiny
: Your characters, gear, and progress are synced automatically across all PlayStation consoles. Destiny 1 : PS3 to PS4 (Legacy Status) True cross-buy for the original was a limited-time
For the current game, the transition is seamless because is free-to-play. Destiny 2 : PS4 to PS5 (Modern Standard)
: If you own a digital version of Destiny 2 on PS4, you automatically have access to the PS5 version.
: Expansions purchased on the PlayStation Store work across both PS4 and PS5 as long as you use the same PSN account.