i have been having trouble getting online, saying the destiny 2 server is unavailable. game loaded ok, but not able to play. seen a lot of people with same problem lately. I have found a fix for pc users. i'll try to explain the solution as nicely as i can.
go into device manager in windows. (this should work for any version of windows)
delete all devices listed under network adapter. i mean all devices. do not leave any behind.
close out of everything you have open, and restart.
it will reinstall all drivers on its own. then try the game again.
it fix my problem right away, and working as it did before the latest update.
seems the problem maybe in the network stack somewhere, but doing this will reset all network to defaults. and wipe out all the old info. this is a good thing.