I could not find an answer on this in the forums or FAQ, the closest thread I found was this: https://itch.io/t/3575159/can-i-add-content-to-an-existing-co-op-bundle-on-itchi...

One of the games in a planned co-op bundle needs to release 2 days later than the bundle itself, but I would like for itch users to be able to buy the bundle as soon as possible, then come back later once the game has been released.

Of course, this would be made clear to all users before purchasing the bundle. It will say exactly which games are available now and which are coming in a few days, but I wanted to make sure this was allowed on the platform. Users will buy the bundle with a clear disclaimer that one of the games will be available for download in two days, then they can come back and download it when it has been made available.

Can anybody confirm if this is an accepted practice? Just want to make sure I'm doing right by itch, thanks!