Good news PlayStation 4 and 5 owners - Sackboy: A Big Adventure has been patched and now has an online co-op mode available. The PS5 launched title launched with couch co-op only.
You can play through Sackboy’s whole adventure from start to finish with up to three companions. And we have included a set of ten dedicated Teamwork Levels where you and your friends will have to work together if you want to succeed. There are two Teamwork Levels in each of the five main game worlds. In these exclusive multiplayer stages, you and your team will need to collaborate, coordinate and communicate to reach your goal. And you should expect that at some point it will go completely pear-shaped, often with hilarious consequences.
Teamwork levels are a set of ten dedicated missions designed for the game's four player co-op mode. Any progress earned when joining someone's co-op game will be carried back to your own game, and the patch even includes the ability to cross play between PlayStation 4 and PlayStation 5.
Apparently there's still some rough edges with the online mode and there's a promised future patch to polish things further.
Source: Blog.playstation.com