Unable to unlock coop levels

For anyone wondering this question (like I was as well) all you have to do is complete the survivals on single player for all levels day, night, fog, etc. then it will unlock the hard versions on single player and co-op. In order to progress further you need to beat the hard versions on single player to unlock them on co-op. Hope this helped! Happy planting! 🫶🏽

Yeah when i checked the coop levels i had like EVERY coop level, even the hard ones.

How do you get trophies for hard levels in coop? My wife and I have completed the levels in coop mode for multiple times and we get a trophy at the end of the level every time. But the problem is it never shows up on the level selection menu. Don't know why.