Please reset network setting of both Sim one by one and than reset all settings of your's device in general management settings also Flight ✈️ mode on n off one time, restart your's device without any Sim in slots also interchange Sim in slots. Thanks.
As per your concern, we want to inform you that kindly check the following criteria to make the Wi-Fi call on your device.
Make sure you are connected to a strong Wi-Fi network. If the network signal is weak or unstable, the Wi-Fi Calling feature may not work. To use Wi-Fi Calling, you need to insert an active SIM card from a carrier that supports this feature. Check with your network provider if your SIM card is supported. If that doesn't resolve the issue or if access to the feature isn't allowed, please contact your Network service provider for further assistance.
