Most (all? But I’d have to double check) of my hdmi cables have the version printed on the cable jacket. Seems entirely sensible to do.
Fully agreed – the maximum supported data rate would be even more important to be printed on the cable for HDMI.
One reason I could see why manufacturers would be hesitant to do this is that some future improvements might not have higher requirements for cabling, so the printed data rate might be underselling actual capabilities.
I just had to go through the "do I have any good HDMI cables" dance, and the answer was effectively no.
The closest was one that said "High Speed HDMI cable with ethernet" but I'm not sure what "high speed" is supposed to mean