That makes sense, since USB 3.2 Gen 2x2 achieves its maximum speeds by using two 10Gbps channels to transfer data, which is only possible using USB Type-C.
And, even then, most people probably dont have any reason to push 20 GB/s at homenot unless youre looking to, say, run a 4K monitor at crazy-high refresh rates off a USB-C connection.
Still, when a manufacturer promises crazy-fast USB 3.2" speeds, do your homework and check what they really mean.