First, it's important to note that having a WiFi 6 router does not automatically deliver noticeable improvements.
Expected application throughput will be around 70% of that, or 455 Mbps ±45 Mbps.
Better handling can support more devices, allowing even more IoT devices in the home to use the internet.
The end result is a slightly stronger signal in the direction of the device , which typically causes a slightly higher modulation to be used, which in turn increases Mbps speed by a little bit.
There are just too many caveats and 'gotchas'.
And 'at distance', other Wi-Fi 6 clients will see a speed improvement lower than that closer to 11%.