AirTag on FB Marketplace Bike

New to riding, and I recently bought a bike off fb marketplace. On the hour drive home I was notified that someone else’s AirTag was traveling with me the whole way—it has to be somewhere on the bike. I asked the previous owner about it and he said he didn’t have an AirTag on it, but I know he only had the bike for a month or two, and there was a previous owner before him.

Regardless, I don’t like the idea that there’s an AirTag with me on the bike. I checked under the side panels and under the seat but can’t locate it. Any ideas where it may be?