https://wccftech.com/despite-having-a-thunderbolt-3-port-the-new-2021-ipad-pro-will-ship-with-a-regular-usb-c-cable/

Classic Apple. The new 2021 iPad Pro features Thunderbolt 3 across the board but the company will ship the tablet with a USB-C cable in the box.

Apple surprised everyone with the inclusion of the M1 chip in the iPad Pro lineup, but took things further when it revealed how it is going to slap a Thunderbolt 3 port in the tablet as well. That very same port is USB 4 capable, meaning it is fast and supports speeds of up to 40Gbps.