In theory. In real life you are lucky to get around 500Mbps. That too with expensive equipment on both router and client side.What?
You know Wi-Fi 5 aka 802.11ac has always been able to give gigabit+ bandwidth, right?
Now we have Wi-Fi 6 aka 802.11ax. Wi-Fi 6 has the base speed of 1.2Gbps.
If your router and client device is Wi-Fi 6 certified. 1 Gbps minimum wireless bandwidth is basically a guarantee if the range is decent and there's no bottlenecking.