The Current WiFi 6 clients and router have OFDMA problems, some are not turned on by default, some require firmware upgrade which you can guarantee wont happen with lots of users, many do not support 80+80Mhz / 160Mhz.
Without some of these features, current WiFi 6 / 802.11ax is nothing more than WiFi 5.5 or a slightly improved 802.11ac Wave 2.
I hope next generation WiFi6E client [1] and Router fixes all these problems.
[0] 1200Mhz only in US, Europe and UK are only getting 500Mhz and are on similar time frame with US. No idea on the scheduled in rest of the work.
[1] https://www.broadcom.com/products/wireless/wireless-lan-blue...