I am having an issue with the Sports app and Live Activities. I am on IOS 26 and 17 Pro. I have 4 teams tagged as Favorites. 3 Played today. One team came up today and showed me updates. The other 2 teams never came up at all. I had similar spotty results last weekend.
I went in deselected all my favorites and reselected them. I also unchecked the Live Activities options in the Sports app setup, then reselected those. No improvement.