AirPods not appearing on Find My iPhone
I've just bought a new AirPods Gen 2 and paired them with my iPhone. For some reason I can't see or search them with Find My iPhone because they are missing from 'All Devices'. I opened iCloud.com and go to Setting and they're also not there. My iPhone is connect to my iCloud account. I can find my Watch or MacBook but not the AirPods. My 'Find My iPhone' setting is turn on. I don't know why its missing from my devices. I looked Google for some solutions, and also looked in here, but nothing helped me. Tried to reset AirPods, tried to 'Forget the Device' and re-pair it, turn on off Find My iPhone, etc. Please help.
Technical specs:
iPhone 7, iOS 11.4.1
Apple Watch series 3 Nike edition, WatchOS 4.3.2
MacBook Pro (Retina, 13-inch, Early 2015), MacOS High Sierra 10.13.6
Thanks.
iPhone 7