Lost airpods

I lost my airpods and they were not charged. I tried checking the last location through find my iphone but it doesn't show up. I saw many people providing a link to know if they were stolen or how to find it, but I already tried that. If anyone can please really help on why my airpods do not show their last location I would greatly appreciate it. They show up in the app but it doesn't give me the last location.