I need to replace lost right AirPod pro bud

For information about replacing a lost AirPod Pro, see the following from: Find your lost AirPods - Apple Support

Replace a missing AirPod or charging case

If you still can't find your AirPod or charging case, or if something is damaged, get the serial number and then contact Apple Support for a replacement. Then learn how to set up your replacement.

Learn more about AirPods pricing and service options