can some one explain how to enable wifi calling in MOTO g32 phone. (opens in new tab)

Hi, there is no menu like wifi calling in moto g in sim nd mobille settings \.I also checked phone app, calling accounts,there is no menu\. while 4g callling option is available for toogling, the wifi calling menu is not shown\. I have 4g sim and , i want to know , how to access this menu to enable it if i need it\. there is general video of enabling wifi toggle switch or tab\.But there is no such menu in my MOto g 32 phone\. please say ,