I found a good article at the The Athletic (pay wall). It doesn't sound like teaching is a strength. Its not a weakness but it wouldn't be among his strengths. His strengths are relationships with players, creativity, and collaboration.
https://www.nytimes.com/athletic/2324003/2021/01/15/brian-daboll-bills-coaching/
https://www.nytimes.com/athletic/2324003/2021/01/15/brian-daboll-bills-coaching/