The R6 has the same wi-fi as the R and RP. Its not very advanced and very slow to use for raw images, transferring 15 jpeg images is bearable. I'd never try to use Lightroom to transfer them wirelessly, I don't think transferring them using USB to Lightroom is a great idea either, Canon's utilities works fine. If you transfer them to a watched folder then Lightroom picks them up automatically.
To transfer them using Canon software, you must be running Canon image transfer utility 2 on the laptop or computer and go thru some configuration of the camera. Then, with wi-fi turned on on the camera and auto download turned on, it will transfer images after you restart the camera. So only images taken before the restart are transferred. There is no direct transfer wirelessly as you take the photos. The R5 has the more advanced version of Wi-Fi, you can do a wireless FTP transfer.
You can transfer via wi-fi directly to a phone or tablet as you take images, just not to a pc or laptop. I only transfer to my phone in the case of traveling where I want a backup copy.