Lost iPhone 14 Pro

"No device found" indicates that Find My was not enabled on the phone before it was lost. You will have to look for the phone the old fashioned way. Retrace your steps, check with restaurants and shops that you visited.

Hello,

See this:

If your iPhone, iPad, or iPod touch is lost or stolen

Good luck.

It's part of one of the last 2 updates so you need to go to settings down at the bottom and disable the feature

this actually also can happen