Check whether your mobile phone has enabled the step counting function authorization. If this function is not enabled, the counting cannot be synchronized. If you have enabled the step counting authorization function, you still can't count steps. Suggest restarting your phone.
Finger on the screen, turn down and turn to Xiaomi account. Click Xiaomi account again, open Xiaomi VIP in Xiaomi account, click mine in the page, click recorder, click the number of steps today, and open pedometer.