If you don't have diabetes type 1 or type 2, or temporary diabetes related to pregnancy, then you don't really need a CGM. CGM is a life-saving tool for people with diabetes type 1 mostly.
I was hugely ignorant of diabetes type 1 before my child suddenly was diagnosed with it. It's an absolute nightmare, a horrifying disease no one is taking about while there are millions of children affected by it worldwide - and the disease is spreading, getting worse every year. It's astonishing how many unknowns there are in this disease.