I don’t think there are any 240 watt chargers on the market though despite it theoretically being supported. Last I read, there were some doubts around if it was truly feasible. Laptops that require more than 90 or so watts still come with proprietary chargers because they can’t charge at full rate over USB-C.
My Dell laptop is 240 watts and the only way to charge it at full rate over USB is to buy a proprietary $250 charger from Dell that provides two USB cords that must be plugged in together to achieve a combined 240 watts. The 90 watt charger from my old laptop won’t keep it running for more than an hour.
Anyway, hopefully we see 240 watt USB-C in the future but at the moment it seems to be vaporware. Maybe this ruling will push it forward.
I’m speaking from a US point of view. To my knowledge there are no 240 watt USB-C chargers in existence.
There are a handful that claim 240 watts but upon closer inspection only provide a max of ~100 watts per port.
There are cables sold with a 240 watt rating but no actual chargers.