WiFi standards are numbered. WiFi 5 was the norm for a long time. WiFi 6 (and its variant WiFi 6E) and WiFi 7 are newer.
The main advantage for offices is not the top speed, but that the new standards handle crowds much better. They can serve more devices at once without everyone slowing down. WiFi 6E and WiFi 7 also use an extra frequency band (6 GHz), where there is less interference.
To benefit, both the access points and the laptops and phones must support the new standard. And the cabling behind them must be able to handle the speed (see CAT6A).
What does this mean for the IT-Label?
WiFi falls under Infrastructure, and under Performance it is measured under real load. Newer standards can handle more devices at once and so help towards the higher levels: IT1 requires strong WiFi coverage, IT1+ enterprise WiFi. See also access point and CAT6A.