If you’re referring to the crowd-sourced collection and contribution of Wi-Fi SSIDs, iOS has the “Wi-Fi Networking” toggle in location services that turns this

If you’re referring to the crowd-sourced collection and contribution of Wi-Fi SSIDs, iOS has the “Wi-Fi Networking” toggle in location services that turns this on or off. If you’re referring to the use of that data, it is one of several components in the locations API that cannot be separated out.