If you've got a lot of carpenter bees in your area, those bee homes are actually a good idea, otherwise they'll burrow into the wood of the house: https://imgur.com/a/cxQFNWG
Hey there, I actually make these homes! Unfortunately, carpenter bees don't have any interest in the model we have now as they like to make their own holes in softwoods. I'll be working with a professor that specializes in larger carpenter bees (Xylocopa) over the winter to build some habitats that are suitable for them, though, and plan to test them at her research site in the spring.