Support for setting SharePoint Managed Metadata (taxonomy) column values and other complex column types on items via the Graph API
It is currently not possible to set the value of a Managed Metadata column on a SharePoint item using the Graph API.
Support for setting values on all standard SharePoint columns types is essential in the Graph API to drive adoption of this API. The following column types are currently not supported and have been raised in other UserVoice requests:
Thank you for your feedback! This work is on the backlog and currently isn’t scheduled. The feature will be updated here once dev work has started. -EY