Wi-Fi calling is the ability of use the voice service over Wi-Fi connection. Keepgo eSIMs are data-only plan esim and we do not provide voice service.
On the other hand, we recommend you to use any supported VoIP app such as Skype, Whatsapp, Telegram, etc to make calls via internet connection. Or TextNow, Ring4, etc that can give you free phone number or free calling minutes that you can call any local number.