Some USPS and UPS, FedEx etc packages are being delayed some because of the virus that is going around right now.
Due to not having as many workers in the sorting facilities to process and sort the packages and load the packages onto the trucks and get them on their way to the destination it's taking a bit longer to get packages that you ordered online.
I've noticed for some packages that I've waited on that it took an additional 1 to 2 days to get the package but it was not that much extra time to have to wait.
Once this virus gets over with in hopefully a few more years then everything will return to normal and we'll get our packages sooner.
You just have to have patience and if the package does not show up within 7 to 8 days then contact the seller or USPS or the shipping company to see what has happened to your package.