Item Isn't Being Scanned

I dropped off an item at the post office yesterday morning. I placed it in the drop box like instructed. Unfortunately, it is not showing that it has been scanned. I went back to the post office to ask and they said it is off to the distribution center and would be scanned in today. Still no scans.

What do I do now? Should I contact eBay so they are aware? I did message the buyer to let him know that I did ship it and am monitoring the situation.

Update: I just got an update from USPS that it has arrived in the buyers state. Thank you everyone!