Qualcomm Halo is able to transmit about 3.5KW. They once got up to 20KW in a demo. The technology has been sold off to WiTricity. Tesla's biggest Supercharger model transfers around 250KW. Although Qualcomm has been announcing that technology since 2013, there seem to be no non-demo installations.

“A partnership between Cabonline, Jaguar, Momentum Dynamics, and Fortam Recharge are launching a wireless charging taxi fleet in Oslo, Norway. The fleet consists of 25 Jaguar I-Pace SUVs equipped with inductive charging pads rated at 50-75 kW. The pads use resonant inductive coupling operating at 85 Hz to improve wireless charging efficiency and range.” [1] https://spectrum.ieee.org/cars-that-think/transportation/adv...

"Are launching". "Will be". No follow up on how it worked, a year later.

There's no way that wireless power transfer achieves the same efficiency as a wired connection.

The efficiency metric would need to take into account the number of cars it can charge at a given time and things like that also.