Apple Health tracks flights of stairs automatically — not because they were "workouts," but because they happened. Bikes deserve the same. Your race bike is already on Apple Health; your shopping bike isn't on anything, and when the mechanic asks how many kilometres it's got, you shrug. Everytime is the shrug-fix.
Ride identity lives on the bike, not the ride. One phone, many bikes, many sensors. The phone stays in your pocket; trips get a GPS route, a wheel-truth distance, and a bike attribution. Every ride automatically syncs to Apple Health.