Editing from iPhone Photos app does not save
I do this so often looking for a way to edit and to save over original.
Method 1
Open photos app on iPhone
Click Edit top right
Click on 3 dots choose PS Express
Make my edits in PS Express
Done (there is no option to save)
returns me to photos
the image is not saved over
Method 2
Open image in PS Express
make Edits
I can save, but not over the original
I would prefer to use photos app, as 90% of images I can correct there. If I need clarity, dehaze or HDR if use PS Express. While is no problem to delete the previous version, it just makes clutter, and changes the order of my photos.
Another way that would; be good is for Photos to use PS Express by default.

