I had a work-study job in college at our small local airport working for the FAA. I mostly clipped new FAA communications into 3-ring binders and tore off expired ticker tape weather reports for a couple of hours a day.
My boss was old school government employee, straight and square. One day we were talking and he handed me a FAA business card with a UFO reporting 800 phone number. Odd I thought, and put it in my wallet.
Years later I lost my wallet in a phone booth (am old). I got a call from someone who found my wallet and wanted to return it. He came over with the wallet which had everything still in it, including cash. The only thing missing was the UFO card. I've never seen another one.
I suspect that if you look hard enough you'll always be able to find unidentified objects of the size they've been shooting down in US airspace.
They 'turned up the detectors' and are shooting a few down now purely as cover for the Biden administration which looked stupid and weak letting a giant Chinese spy balloon float across the entire continental United States.