This Covid thing has gotten all 3 (Fedex, UPS, USPS) in a twist the past couple of months. Fedex failed me on 4 out of 6 packages, I was so irate last time they gave me my money back PLUS a $30 voucher (just to shut me up). This package was "suppose" to contain two 9.6v batteries, the driver actually delivered an empty envelope that had a neat 4" slit cut across the top!!! The one before that, they left on the neighbors porch, even sent me a photo of it as proof they delivered it. The other 2 were said to be delivered, only to get 1 the next day and the other dropped off in the middle of the night.
UPS has had a few hiccups, but the packages were delivered within a day of the actual date. USPS has been the best so far, but I had one that was within 2 miles of my house at the main facility and then I get an email saying it was being sent back to the sender because of lack of sufficient address, only to be on my front porch the next morning.
I don't worry about stuff that was fairly inexpensive, but when it's a couple hundred $$$ then I start to get concerned.
I will say the last week or so they have all improved or back to normal anyway. But with Christmas coming up I can see what a mess it could become.
My suggestion, call them, repeatedly if necessary, until you get their attention. Find their phone numbers and keep them close by. Talk to a supervisor if you have to and keep good records of your package info and who you talked to.