Brand-New Itel S23 Phones Constantly Lose Wi-Fi Connection

I bought two brand-new Itel S23 phones. I am experiencing Wi-Fi issues on both devices.

While other phones next to us are connected to the same Wi-Fi network, we constantly receive a "no internet connection" warning on both of these phones. Toggling the Wi-Fi off and back on sometimes restores the connection briefly before the issue happens again. Other times, it won't connect at all, forcing us to restart the phone just to reconnect to Wi-Fi.