Elliptical Workouts Not Live Tracking on Phone

For some reason, elliptical workouts started on my Apple Watch (Series 6 and now Series 11) do not track live on my iPhone 15 Pro. I can view the workout after I finish, but I am unable to view my heart rate as I’m working out.

This is not a problem with any other workout started on my Apple Watch (e.g. walking, indoor cycling, outdoor cycling, etc). When I try starting the workout on my phone, it says that it’s starting the workout on the watch, but never does.

This is frustrating when I’m trying to do Zone 2 and HIIT workouts. Any clue how to fix this?