Harbaugh is going to do what Harbaugh is going to do, and whatever he is going to do has ZERO ties to anything that the national media is spewing.
Harbaugh has always been a wildcard, but the media (particularly those with the NFL ties) showed their ass when Harbaugh came to Michigan and they all laughed the notion of him returning to college off as a joke until his wheels landed at DTW. If John Bacon starts saying something is up, then I would pay attention.
It shocks and offends the NFL talking-heads (and frankly some of the national college ones too) that someone who was successful in the NFL and could have an NFL job if they wanted it is just happier in college. This literally happens every single year. To save you the clicks, those each link to stories rumoring either a possible, soon, or inevitable move to the NFL, from 2021, 2020, 2019, 2018, 2017, and 2016.