Find My Network option does not appear on my iPhone 8 Plus IOS 15.7

I read an article about finding your iPhone even when the power is turned off. It indicated that one should turn on Find My iPhone and Find My Network. It had a graphic of where it should be, like on the same settings page as Find My iPhone, but my iPhone 8 Plus did not show that option setting at all. Does anyone know how to get this Find My Network option to show up? I am on IOS 15.7.x. Thanks.