Hello Luke,
Thank you for contacting Microsoft Support!
According to the documentation https://learn.microsoft.com/en-us/graph/api/resources/bookingstaffmemberbase?view=graph-rest-1.0, only id parameter can be retrieved using Graph API.
You can submit this feature request using this support link, which will be monitored by Microsoft team and make the enhancements to Graph API.
Hope this helps.
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