I ordered a QuantiZer from them on Wed. Sept 15 and it arrived the following Monday. Since the pandemic I don't expect packages to arrive on time but I do remember Control sending out a couple of emails about how the pandemic affected them.
You don't list your country of origin (edit: after re-reading your post, I think you're in the US?) so that could be a huge factor. Priority is above first class. Beginning October 1st, crony and unexperienced puppet USPS Post Master General Louis Dejoy is slowing down first class mail. Read about the shitshow here. Also, it's possible in rare scenarios that the package is on its way but hasn't been scanned. The other week I received a package that was scanned once it arrived at the origin facility and then wasn't scanned again until it arrived at my doorstep.
I would call Control and try to figure out the situation. Maybe it was suppose to go out and didn't.