https://goshippo.com/blog/how-online-merchants-can-adjust-to-new-usps-delivery-times
New USPS Delivery Times: Guide for Online Merchants
USPS shipping times for FCPS packages will be slowed down as of May 1, 2022. We explain how merchants can adapt to new USPS delivery times.
usps delivery timesfor onlinenewguidemerchants