They surely are! There are many, many species of “beneficial” insect that need that kind of safe harborage. If you haven’t yet, have a look at your regional NRCS office (US based Natural Resource Conservation Service) or similar governmental agency if you’re based elsewhere. They’re likely to have research data on species of concern, those at-risk, or other threatened status as well as ways to make spaces hospitable to them - all specific to your area.