Find my not playing sound

If you are on your own iPhone and try to play a sound for your iPhone in Find My, it will not play a sound, at first. You will get a vibration warning, then the sound should start after that. My sound appeared after the vibration and the receipt of the email saying that Find My played a sound on my iPhone.

So you did not receive the vibration or the sound? Are you signed in with the same Apple ID? Try going to www.icloud.com/find, then log in with your Apple ID and attempt to play a sound there.