im lost my airpods pro case

Hi manopriyan

As the "Related Article" above your questions says:

"If you didn't turn on Find My before your AirPods went missing, you can't use Find My to locate them."

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Locate AirPods in Find My – Apple Support

Says:

"Find your AirPods Pro (2nd generation) or charging case when they’re separated

If you have AirPods Pro (2nd generation):

You can see the location of each of your AirPods Pro and the charging case on the map in the Find my app . 

If you’re nearby, you can also play a sound from your AirPods Pro to help you find them.

On iPhone or iPad"

open the Find My app,

tap Devices,

then tap the name of your AirPods Pro.

You can see the location of your AirPods Pro and the charging case on the map.

Choose one of your AirPods Pro, or the charging case, then tap Play Sound."

All the best :-)