how to turn on find my iphone from my computer
how to turn on find my iphione without having the phone
iPhone 11 Pro Max, iOS 13
Question marked as
You have to do it on the phone itself. From the computer you can activate lost mode on a device with Find My already activated.
Set up Find My on your iPhone, Mac, and other devices [iOS13 and Catalina] - https://support.apple.com/HT201400
Use Lost Mode in Find My iPhone on iCloud.com - https://support.apple.com/guide/icloud/use-lost-mode-mmfc0f0165/icloud
If your iPhone, iPad, or iPod touch is lost or stolen - https://support.apple.com/HT201472