Hello, friend!
You can use the Speedtest to check whether the Wi-Fi function is normal. You can also use the wired access mode to check whether the Wi-Fi function is normal.
If the speed test fails, check why the speed test fails. Check whether the wired network is normal. If the wired network is faulty, check where the congestion occurs.
If the Wi-Fi is faulty but the wired network is normal, Wi-Fi interference exists. In this case, adjust the Wi-Fi channel.
Thanks!