Hi Ching Lung,
Thanks for reaching out.
Unfortunately, you cannot upload file using share endpoint (https://learn.microsoft.com/en-us/graph/api/driveitem-createlink?view=graph-rest-1.0&tabs=http)
However, for your use case you can either try to create and app with application-level access and provide that to users to upload the files to that particular folder using the following graph API call mentioned in the link below https://learn.microsoft.com/en-us/graph/api/driveitem-put-content?view=graph-rest-1.0&tabs=http
or would you consider filing a feature request on the M365 developer platform so this can be looked into?
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