https://www.gamespot.com/articles/destiny-2-servers-down-before-new-patch-update-ser/1100-6454553/

It's taken slightly longer than expected to arrive, but a new update for Destiny 2 will launch on all platforms tomorrow, November 2. This will be accompanied by a maintenance period that will temporarily bring the game's servers offline. [Update: Destiny 2 servers are now down before the new patch is deployed.]