I AirTag alert on my phone try looking for it with my iPhone. Can I find it the map shows right when I picked up a lady friend of mine and went on and then I dropped her off and went off today and said I had a alert about some kind of sound on my iPh

an AirTag alert came up on my iPhone five minutes after I dropped off a lady friend of mine. I didn’t know what it was never had that alert come up but I had a map of where my truck was driving after I picked her up and when I dropped her off, it stopped, so she had something on her or put it in my truck and my phone told me to try to look for the sound or play the sound and I couldn’t find the AirTag in my truck so either she had it on her or she left it in my truck and I couldn’t find it and then she turned it off and then today my day later it said I had another alert it said at 12:44 PM that my iPhone picked up a sound so I don’t know what to do that means I might be in AirTag in my truck somewhere so what do you guys recommend?