How can I call on ipad using SIM card like how does iPhone does that

I’ve been using my iPad for 1 month and I’m really suffering by a Problem when I heard that my iPad is cellular and WiFi compatible then I tried to call someone using phone like how iPhone does but I didn’t find the phone app. Now I cant make calls using my iPad and using sim please do somethng can we VOLTE On every ipad so we could make calls using our own sim. Like how iPhone does. That will be so awesome if u can do that