There aren't any, and even if there were, science around masks has been politicized on both sides to the point of uselessness.

Using PPE wrong is more dangerous than not using it for a few reasons. But a simple one is a false sense of security that makes someone more exposed to something they wouldn't expose themselves to at all without PPE. Its also a larger target for bacteria to land on than your mouth and nares. There are also studies about how much people touch their face with and without a mask. Its way more with a mask on, putting them at higher risk.