Why i cant get my losted device backup

Hi ameen232,

Welcome to the Apple Community.

Wondering

• which device you have lost.
• where the back-up is located
• wheat device you want to transfer a copy of the back-up to.

Apple support have articles online that may (or may not) help.

Eg:

Back up and restore your iPhone or iPad to your Mac or to iCloud

https://support.apple.com/en-au/guide/mac-help/mchla3c8ed03/mac

Restore all content to iPhone from a backup

https://support.apple.com/en-au/guide/iphone/iph1624229a/ios

Back up your iPhone, iPad or iPod touch in iTunes on PC

(Scroll to: Restore your device from a backup)

https://support.apple.com/en-au/guide/itunes/itns3280/windows

Restore your iPhone, iPad, or iPod touch from a backu

https://support.apple.com/en-us/HT204184

Hope this helps you :-)