Can I upload Draft Timesheets or Approve them after upload?

Yes.

The default option for uploading timesheets to Xero is a status of Draft. If you would like to upload timesheets with a status of Approved, just select the appropriate radio button when importing your file to UpSheets.

Alternatively, you may select the Approve All button after uploading your file to Xero and UpSheets will approve all eligible timesheets for you.