how do i find my phone using iCloud

then use find my phone if you have set it up on your iPhone and your computer - Find My iPhone, iPad, Mac, and Apple Watch - Official Apple Support

LN

Did you lose your phone or just testing the feature? If the phone is turned off or the feature disabled it won't show up.

If you're just testing the feature make sure the feature is turned on and then reboot your phone. Then log in to your iCloud account at icloud.com and check again.

OT

Lost my iphone