I lost my old phone but I used to have a lot of pictures and I want recover all of pictures

'If you're missing photos or videos in the Photos app' on a mobile device, click here --> https://support.apple.com/HT205912

-Make sure that iCloud Photos is turned on

If you were not using iCloud photos to sync your photographs then they may still be stored on another device or as part of a backup. You can restore the backup ( https://support.apple.com/HT204184 ) to recover the photos but doing this will require erasing your device and restoring everything back to the time when you made that backup.