I lost my AirPods case and the left AirPod

Hello,

If your AirPods are out of Bluetooth range, out of charge, or in the case with the cover closed, Find My won't give a current location. You just have to find them manually by looking for them. However, Find My may list the most recent location where they were last connected.

See this for more detail:

How to find your lost AirPods, AirPods Pro, or AirPods Max

If you can't find them, you can order replacements here:

Order replacements for Lost or Missing AirPods

Good luck.