Please don’t go to your dealer about this because this is not an issue/problem. He might just laugh at you and (worse) maybe not take you seriously the next time you come in with an issue.
As others have said, there is no audible confirmation of lock or unlock with ANY trim of this model Odyssey. The only thing available is the horn sounding once if you press lock button a second time when locking your vehicle.
No, no chirping options for any trim, there just a single horn beep when you press to lock twice. My neighbors' Toyotas "chirp" when locking and unlocking, it gets really annoying at 6:30AM
See it this way, you know you don't bother anyone if you just press lock once