Thank you for posting here in Apple Support Communities, malini27.
We understand that your dance workout data isn't updating on your Apple Watch. We can help provide you some information that should sort this out, as well as point you towards the right direction for further assistance. To start, we ask that you check for and install any available watchOS and iOS updates:
Update your iPhone, iPad, or iPod touch
Update your Apple Watch
Once done, let's go ahead and restart your Apple Watch: How to restart your Apple Watch
Let's also use the information within this resource to help calibrate your Apple Watch: Calibrating your Apple Watch for improved Workout and Activity accuracy
If you continue to experience the same issue after performing the steps above, we recommend that you contact Apple Support next. Here's how: Get Support
Take care!