What USB version does Apple Studio Display support?

their tech spec page Studio Display - Technical Specifications - Apple

state

Three downstream USB-C ports (up to 10Gb/s) for connecting peripherals, storage, and networking

USB 3.0 - Wikipedia

suggest that 10Gb/s is

10 Gbit/s (1.212 GB/s, USB 3.1 Gen 2)

In addition to Rudegar's reply, the USB standards naming convention has gone through a number of changes.

The USB standard that defines a 10 Gbps data connection is now known as: USB 3.2 Gen 2x1. Previously, as Rudegar has mentioned, it went by: USB 3.1 Gen 2. To add even more, it can also be referred to as either "SuperSpeed+" or "SuperSpeed 10Gbps."