The Eurosport coverage frequently discusses equipment issues in response to tweeted questions from viewers. But for obvious reasons they tend to do so at uneventful parts of the stage, and those tend to get cut from highlights shows. So unless you can sit and watch extended coverage of whole stages you're likely to miss them.
Plus there is a limited amount to say. All the bikes are the same weight to within a few grams, because all the manufacturers can produce bikes below the UCI weight limit and many of them have to be weighted to stay at or above that limit. Everyone's on electronic shifting. The differences between Campy and Shimano are pretty meaningless in performance terms. Differences are pretty subtle - a particularly aerodynamic braking unit here, an elliptical chainset there. The gearing changes from day to day depending on the climbing, some might make different wheel choices in the longer TT stages, but for the most part they are riding very similar equipment