Yes, I missed that. But the bag is quite rare. I also saw wax for sale at a merchant in the wasteland, though I don't know if he got it when he updated his inventory or if another player sold it to him (I play on a dedicated server).You can also get beeswax also in lootbags from rancher zombies (desert). In my current playthrough, I have an apirary already crafted by Day 14, default settings except for storms (200%).
But during the 12 days I spent celebrating the holidays and playing, one thing surprised me. In the winter biome, stumps contain much more wax and honey than in the forest. In the middle of five stumps, two had honey and one had wax. In real life, the last place I'd look for bees is in the snow, but in the game, things are different.