Wrong Calories for cycling

I cycled today using my Apple Watch 3.

1 hour of cycling 47!! Calories only. And 10 Km. Which is outrageous.

when I walk for 1 hour I burn 150. How could cycling be 47!! And when I put this online the calories I should be burning for 1 hour range from 300-350. This is a huge underestimation and disappointment for me.

Let alone that the watch starts missing my standing hours.

totally disappointed with this watch as a fitness tracker.