Was the engine running at the time?
If you exit the vehicle and close all the doors. it will issue a series of beeps to alert you.
Did you leave your key in the vehicle? Or lights on? That too will cause beeping.
Could also have something to do with auto-locking.
Maybe start here: https://www.crvownersclub.com/threads/series-of-beeps-when-exiting-crv.133554/
If you exit the vehicle and close all the doors. it will issue a series of beeps to alert you.
Did you leave your key in the vehicle? Or lights on? That too will cause beeping.
Could also have something to do with auto-locking.
Maybe start here: https://www.crvownersclub.com/threads/series-of-beeps-when-exiting-crv.133554/