If it’s still frozen, it’s still edible.
Yeah, I just had two dishes for lunch that expired in 2018. A chicken florentine dish and some butternut squash. Had to rinse the frost build up off of both, but they turned out good.
I did throw out a bag of frozen chicken tenderloins that were badly freezer burnt. But fortunately I had another bag of them. They never put enough meat in those premade dishes.