Missing AirPod not detecting

I’ve recently lost my right AirPod Pro (2 nd generation). I’m pretty sure it’s somewhere in my house but it may not be. On the ‘find my’ app it shows that the AirPods are together, but i have the case and left AirPod here without the right. When I go to the ‘AirPods Pro’ section it won’t even recognise that there is a right AirPod, leading me to believe its somewhere out of range. Is there anything I can do?