Which provider covers Xiaomi and Mi Band data?

The Xiaomi integration was renamed to ZEPP at the provider's request.

The Xiaomi integration was renamed to ZEPP at the provider's request. XIAOMI is no longer a valid provider name and the legacy provider doesn't accept new connections, so authenticate Xiaomi users with ZEPP. (ZEPP and Xiaomi are the same integration.)

Only devices that sync with the Zepp app are supported (Mi Bands up to roughly the Mi Band 6).

Newer Xiaomi bands that pair only with the Mi Fitness app are not currently supported. These can fail in indeterminate ways, including login errors or missing_scopes, because the ecosystems were previously interlinked. These are device-compatibility issues rather than missing OAuth scopes.

Ask the end user which app their device pairs with before connecting.