Photoshop Express creates a long 35 character file name when saving an image be it to Photos or files. I expect the long file name come from the iOS operating system.
This is not SEO friendly and meaningless. Other Apps allow you to change the file name in App os it is possible and convenient.
I know you can change the name in files but what a bother and beyond some I expect.
This needs to be added to the saving preferences along with dpi setting and file type.