Note that Thunderbolt 3 is not part of the USB 3.2 standard. It's the basis for USB 4, but right now to be fully standards compliant with everything USB-C itself can fully do you do not need to be Thunderbolt 3 compatible, because thunderbolt 3 is not part of the spec at all.
And even if you wanted to be Maximum Compatibility even with Thunderbolt 3 you may not have that option as TB3 tops out at a cable length of 2 meters, and at that length you're dealing with half-rate bandwidth (just 20Gbps instead of the full 40Gpbs - which you only get up to 0.5m)
> Note that Thunderbolt 3 is not part of the USB 3.2 standard.
It may be better to say that Thunderbolt 3 is a 'superset' of USB: TB is its own protocol, which allows for the carrying of USB over it (as well as PCIe and DisplayPort).
And even if you wanted to be Maximum Compatibility even with Thunderbolt 3 you may not have that option as TB3 tops out at a cable length of 2 meters, and at that length you're dealing with half-rate bandwidth (just 20Gbps instead of the full 40Gpbs - which you only get up to 0.5m)