I am a customer service supervisor for USPS, that means I supervise mail carriers. I can tell you since the current PMG has been in place, there have been more delays in mail delivery than at any point in recent history. Hopefully something will change soon. There is no reason why there should be delays is letter mail or packages unless there are bad storms or a COVID 19 outbreak at a certain USPS facility. Go to USPS.com and find the phone number for your local post office (they won’t always answer) to inquire about a lost or delayed parcel.