Can I locate my husbands phone if his device was not listed on my find my phone app my

If you're husband has a separate Apple ID, and the Find My feature was enabled on his device, you should be able to determine the last whereabouts of his Phone by logging into iCloud.com.

Consult with the support article below for more details on how to track a lost or stolen device.

If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support

I amthe supposed to be husband but I am not married and it was my neighbor asking the one who has stolen my identity and my information I have the police reports on it