Seems easier than engineering edible yeast to get them the sterols they need.

The solution is so simple. Crop/pollen diversity. Instead of letting fields lay fallow for crop rotation, they could plant diverse wildflower meadows to improve quality of bee health for the traveling bees that get shipped around for crop rotation. Or the bee keepers themselves that sell the services of their bees, could ensure diverse flower and pollen options when their bees aren’t traveling.