Hi,
you can do this easily using in your Mac / iOS device the Shortcuts feature. I typically do this to convert and Optimize JPG images imported to my devices, but also works for cropped images as you save the new copy of your photos keeping the metadata but removing the cropped area.
Once you have created the new ask you will be able to use it.
Be aware that in the new picture you can’t undo why edit you performed in the original photo!
Step 1: Open the Shortcuts app on your Mac.
Step 2: Switch to the My Shortcuts tab, and then click Create Shortcut. Go to ‘Search for apps and actions’ in the screen.
Step 3: Perform a search for ‘select photos,’ and then click on “Select Photos” under Actions. Afterward, expand the Select Photos action (click on blue icon “Show More”), and turn on the switch to activate “Select Multiple”. This will allow you to add multiple photos at the same time when using the task.
Step 4: click on ‘Search for apps and actions’ again, search for ‘convert image’, and then click on “Convert Image”.
Modify the “Convert Image” action from the default “Convert Photos to JPEG” to “Convert Photos to HEIF” (this will save you precious disk space). Also click the blue icon “Show More” and turned on the switch to “Preserve Metadata”.
Step 5: click on ‘Search for apps and actions’ again, perform a search for ‘save to photo album,’ and then select “Save to Photo Album” under Actions.
You can save the new “optimized” photos in a specific album (select it now — click Recents, and then pick the relevant album on the pop-up list) o If you don’t want to save the photos to any particular album, simply leave the action as it is.
Step 6: Name the shortcut (Optimize photo size, for example), and then click Done. Last but not least, put a name to your new Shortcut.
Now it is time to run the shortcut. Find it in you Shortcut app and click on it.
Step 1: you have to select the multiple photos to “optimize”.
Use the Photos app image picker that shows up to select the cropped images (or jpeg or other format you want to convert).
Click Done to launch the optimization process.
Step 2: The shortcut will show the tal progress, which is really fast. Once completed, go to Photos to view the optimized pics. Using the info utility ou can. Review the size / format of the new version of the pictures, and remove the old ones.
Hope this will cover your need.