I been stumped trying to find where to change this behavior. Using Nop 4.00.
On the checkout page select shipping method step the radio button is always set to the first choice listed. I have both UPS and USPS shipping methods active. I know if I change the display order on the "Shipping rate computation methods (providers)" admin page it changes the first choice to the other carrier. Right now with UPS set as first in the display order UPS 3 Day Select is the default radio button selection.
If I change the display order so that USPS is the first option the checkout selects" USPS Priority Mail Express 1-Day"
There seems to be no way in the admin side that I've been able to find to change the display order of the carrier services for each provider. By the display order of carrier services in the UPS plugin settings, UPS Ground should be first which is what I want but the checkout doe snot follow that order.