The best way to retrieve deleted photos on an iPhone 11 is with the help of a specialized data recovery tool like Disk Drill. Here’s what you should do:
Download Disk Drill to your Mac and install it.
Connect your iPhone to the computer using a USB cable.
Unlock your phone to interact with the Mac.
Launch Disk Drill and choose iPhones & iPads from the sidebar on the left.
Choose your iPhone from the list of devices and click the Search for lost data button.
Select the files you wish to recover and click the Recover button.
Choose a preferred destination for the recovered files and click OK to confirm.