Thanks for reaching out!
Please find below documentation to find out valid Fomat Conversions/Options in v1.0 and beta.
- https://learn.microsoft.com/en-us/graph/api/driveitem-get-content-format?view=graph-rest-1.0&tabs=http#format-options
- https://learn.microsoft.com/en-us/graph/api/driveitem-get-content-format?view=graph-rest-beta&tabs=http#query-parameters
Note: APIs under the /beta version in Microsoft Graph are subject to change. Use of these APIs in production applications is not supported. To determine whether an API is available in v1.0, use the Version selector.
Since your requested feature/functionality is presently not available, you can submit a feature request idea using this support link, which will be monitored by Microsoft team and make the enhancements to Microsoft Graph APIs.
Hope this helps.
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