Now that you've successfully linked/registered your Apple Watch/Health app to your Sonic Boom Wellness account, you'll need to use the Sonic Boom Wellness app to sync/offload/transfer data to your account.
A sync/offload/transfer of data happens when your iPhone's Bluetooth is ON and the Sonic Boom app is opened, click into the "Activity" widget, from here you'll see your steps update for the current day. This happens automatically using Bluetooth.
If you're seeing your steps aren't immediately updating, force-close the app and reopen it. Best practice is to sync/offload/transfer your steps at least twice a day. To see your striding data update in more real-time in the wellness program, it's recommended to sync more than twice a day.