I think Android can do parked car trick. I am guessing only but google maps apps on iOS shows where I have parked car. I am surprised that google does not offer something similar to airtag.
You can use any iBeacon/EddyStone BLE device for this, they are very cheap and are widely available. However, there are no neat built-in features in apps shipped with phones that make use of them on Android apps, you always have to use some 3rd party app and the UX there is usually not that great.
The third party app remembers the location when it last received pulse from the beacon that is in the car and when you open it, leads the user back to it.
Disclosure: I actually happen to kno exactly how this feature works, as I added support for iBeacons in apps for iOS and Android in one of our projects. Not for the functionality described above, but for waking the app once a user walks to a proximity of a beacon. My office beacon is laying at a distance of less than 1meter from me right now.
Afaik, iOS does save a location, and marks it as a parked car, when it looses the bluetooth connection to a device it identified as being a car. So no additional hardware needed for this to work.
No, it doesn't. Did I ever say it did? Also, in my part of the world I don't see many cars around that connect to Android/iOS as a Bluetooth accessory anyway.