Additionally, USB 3.0, 3.1 and 3.2 labels provide no information on the speed

Correct.

USB X.X is the name of the technical whitepaper that describes the standard.

For a long time, USB had three transfer rates. The first legacy speed (slowest) was hardly ever used. The Second was called “Full Speed” and the fastest was called “Hi-speed”. Because people could not remember which if these two were faster, they referred to the whitepapers in which they were introduced.

When later versions of USB were introduced people have tried to continue this mental “shortcut” and have caused themselves nothing but confusion.