I can’t find my wallet with MagSafe. It shows No Location Found.

In order for it to show up on the Find My app, they must still be charged, and another iPhone needs to be within Bluetooth range of it, to pick up its location signal, before that phone can relay that information to the Apple servers. This is where it would appear on the Find My app on your iPhone.

No one here (we are not Apple employees), nor Apple can tell you the last location for your MagSafe Wallet.

Did you lose this Wallet, or you still have it but you are not getting any updated location information from it?

Ref: Add your iPhone Wallet with MagSafe to Find My on iPhone - Apple Support