I was thinking the same thing. Can AirTag help me find my car if I forgot where I parked?

Your iPhone can do that on it's own if you connect it to a bluetooth or CarPlay headset when you're in the car... It will remember where you are when you disconnect from it and tag it on the map for you.

[1]https://support.apple.com/guide/iphone/find-your-parked-car-...

It'd be nice if I could use the Find My app for that rather than needing to open the Maps app (since I use other maps apps).

But good tip, thanks.

Absolutely. I believe it'll find anything where it's placed - shoes, rackets, dog etc

Yes - especially curious if it works in 3D, e.g., in a parking garage.