Search Amazon for "240W USB" and you get multiple pages of results for cables.

A few years ago there was a recall of OnePlus cables that were melting and catching fire, I had 2 of them and both melted.

But yes 240W/48V/5A is insane for a spec that was originally designed for 0.5W/5V/100mA. I suspect this is the limit for USB charging as anything over 48V is considered a shock hazard by UL and 5A is already at the very top of the 3-5A limit of 20AWG for fire safety.