Why does Xiaomi Smart Band 8 not work when I click "Open on mobile phone"?

If there is no response on the phone after clicking on the band to open it on the phone, it may be due to the following reasons:
Whether Mi Fitness keeps running in the background. If not, please enable background protection;
Check whether the phone is currently locked. When the screen is locked, the phone cannot jump;
The current function is working hard to adapt to more models, please wait patiently.
This feature is not supported on iOS.