Last years 12/pro used a year old 5G Qualcomm chip (X55) when a new one (X60) was available, 13/pro uses that new one. Not surprising people are happy.
Apple might’ve signed a deal but it looks like the relationship was bitter enough they aren’t willing to pay for the breaking edge chips. Looks like iPhones will get the Qualcomm modem from the year prior until Apple implements their in house modem.