The medicals are submitted by the panel physician, which is later than the date when the upfront sheet is submitted by you. First, ask your panel physician when the medicals were transmitted to IRCC.
Another reason for the delay is that your medicals may not have been tagged to you file. The medical reports are searched based on the number on your upfront sheet, and they have to be tagged to your application.
Finally, the medials are evaluated by the Medical division of IRCC, and after the evaluation is done, they have to be updated in the file and only then you will see the status change to medical passed. If your medicals were not updated, you will not see the status change.
You can do two things. 1. Send a webform and inquire, or 2. send an email to CPC Ottawa and ask. CPC is usually faster in reverting back.
CPC-CTD-Ottawa@cic.gc.ca