Granted, almost none exist yet even though the spec is four years old, I know of one 180W charger and a handful of 240W rated cables, but the possibility is there.
And while 36V & 48V are the most common ebike batteries, they go up to 92 volts for the “not sure how this isn’t just an electric motocycle” ones (Surron etc).
To be fair, this is probably a voltage difference. The max a PD charger can go is 20V, while some ebike chargers go up to 48V.
USB-PD 3.1 can go up to 48V 5A for a 240W output.
Granted, almost none exist yet even though the spec is four years old, I know of one 180W charger and a handful of 240W rated cables, but the possibility is there.
And while 36V & 48V are the most common ebike batteries, they go up to 92 volts for the “not sure how this isn’t just an electric motocycle” ones (Surron etc).