Another complication is if you're using the faster configuration for 802.11n on 2.4 GHz which requires a wider channel width that consumes two channels. By default many SOHO wireless equipment will default to channel 6 which then becomes extremely congested due to people rarely going into their wireless settings to change anything. To the topic of the OP's thread, you need to check to see what channel you're operating the 2.4 GHz network on. This is why I continue to harp on the fact home users should be looking into the various unified wireless systems out there.
Dell Wireless 1506 802.11b/g/n (2.4GHz) Dell Wireless 1515 Wireless-N Adapter Dell Wireless.
Enterprise networks also go about minimizing latency by adding more access points in areas where there is a high density of wireless devices to allow load sharing across the APs. Download driver v10.0.0.318 for Dell 1705 and Windows 10. Linux Driver for USB WiFi Adapters that are based on the RTL8811AU and RTL8821AU Chipsets - v5.12.5.2 - GitHub - morrownr/8821au-20210708: Linux Driver for USB WiFi Adapters that are based on the RTL8811AU and RTL8821AU Chipsets - v5.12.5. There are newer technologies out that target this specific issue with wireless network latency by implementing techniques such as multi user MIMO or MU-MIMO. This concept is called air time fairness. The reason faster wireless speeds are more than just transmitting data faster is because the faster a device can finish transmitting allows more air time for other devices to talk on the network. The more wireless devices you add, the longer the wait time before a device can transmit which leads to increased latency. Because wireless networks operate in a half duplex manner, there is always a device waiting to transmit when you have more than one wireless device on the network. To expand on the discussion here, with wireless networks, speed and latency are inter-related.