No Antenna for Nano BLE?

I am curious why the Nano IoT has the 'antenna' attached to the radio chip, but the Nano BLE works fine without one. I thought wifi and BLE both use 2.4ghz, and therefore have the same antenna needs?

The NINA-B306 module on the Nano 33 BLE does indeed have an antenna. It's a PCB antenna. It's on the section of green PCB that sticks out from under the metal shield on the module.