Is "not only does it have" used because of the emphasis?
Native speaker’s answer
Rebecca
The grammar is correct in this sentence, "not only" can be used at the beginning of a sentence to convey that "there was not only one thing, but there was an additional thing". Another example is: Not only did I make dinner, but I also made dessert. You can also say this sentence as "It has not only "find your phone" feature, but it also has a "phone find you" feature."