USB4 20 Gbps: Also known as USB4 Gen 2x2
USB4 40 Gbps: Referred to as USB4 Gen 3x2
USB4 80 Gbps: Known as USB4 Gen 4
USB4 Version 2.0 120Gbps
I guess if you're required to support 120Gbps on even cheap small electronics then USB 4 support doesn't make sense