Um, use an Apple Watch and you get the same stuff, plus I use the Music Player in 'mini mode', and 'keep on top', and it works perfectly. On the apps I use that feed into Strava there is a lot of dead space on the screen.
Oh, just realized that they are referring to people doing workouts in Strava. Hmm, in all the years I've been a Strava user, I have never ever done that. I didn't even know it was possible, not that I'd ever use it now that I know. You learn something new every day...