Lower frequency have longer distance coverage, higher frequency have better speeds but shorter distance coverage, and here is common wavelengths of WiFi 2.4GHz 5GHz 6GHz, also new WiFi stands adds new features like mi-mo was added in WiFi 5 and something something raycasting WiFi was added in WiFi 6 and i honestly don’t know what been added in WiFi 7 but specs gonna be better for sure