In apps using the native UI framework (UIKit), text in images is automatically locally OCR’d and is selectable. Apps built in third party toolkits like Flutter

In apps using the native UI framework (UIKit), text in images is automatically locally OCR’d and is selectable. Apps built in third party toolkits like Flutter won’t have this, but that can be worked around by taking a screenshot and selecting the text in Photos. Lens can be used by going to images.google.com or the official Google app. Nothing is stopping the same share sheet flow you mentioned from being possible but for some reason Google hasn’t added a share sheet extension to their iOS app.