Find my iPhone not working with Watch

I’ve been trying so hard to find my Apple Watch which I seem to have misplaced, I remember bringing it into my house which is a start but when trying to find the exact location, are use the play sound function on the find my iPhone app to hear it play a sound. The watch when I last had it was on silent I believe so I turned that off in the app on my phone and turned off the haptics and notification noise. The watch is still not playing sound, the find my iPhone function is not working. Is this a fault in my watch or is a problem people seem to have?