For starters, to achieve those speeds you need full spectrum and supported hardware everywhere. That's not to say likely the higher bands which are easily interfered with by walls.
That setup is perfect world, things next to each other.
I am researching about this for last few days. looks like 6E is good if you have direct line of site. otherwise like slightly better than WiFi 5. If you have majority WiFi5 equipments, your overall performance will be dropped significantly. Because less resources dedicated for WiFi5 or old equipments.
AX has a theoretical single stream speed of ~2.4 Gbps but it is almost impossible to get this speed. Limitations include distance, obstacles, your modem, your devices and contention with other networks. My Netgear a/n/ac/ax router has a max rate of ~2400 Mbps as shown by WiFi Explorer, but the actual speed that I get on my iPhone13 is in the 700-800 Mbps range.
The same will apply with 6E. You will never get the maximum speed. The video below tested 6E in a controlled environment and was only slightly faster than the values I see with AX - 906 Mbps for a single channel, ~2400 Mbps for all channels combined.
P.S. Without a summary people probably aren't going to watch a video. In this case it is particularly important since it is a non-English speaker.
That is when using all bands together. This video showsa single device achieve 1.6Gbps.
Two devices pulling over 2.5 Gbps, I think it has more bands available and able to pull 3X more bandwidth, if the test was did the way they mentioned in that youtube video posted by @HDFan
You need the Unifi Access Point WiFi 6 Enterprise which is currently in the early access store. To get the best out of it you should look to upgrade to one of the 2.5 Gbps enterprise switches. You’ll also need to upgrade your machines for 6e.