Question about Xiaomi Poco X7

Wi-Fi Calling support depends on the specific SIM card and network. The POCO X7 Pro supports Wi-Fi Calling, but it is not clear whether the POCO X7 does as well. The function is usually available if the SIM card and network support it. If you are unsure, you should check the settings of your device or ask your mobile phone provider.

As this is an EU device, there may be restrictions on Wifi calling.