It's not a do-all, end-all photo platform, of course; and it's not a Pixelfed competitor.
But the tinymash Photos plugin allows galleries to be created in content, with an optional slideshow and allowing the visitor to download the photo(s) from the slideshow.
I'm now on 0.90.0 and think I'm about ready to wrap this first public release up soon.
There's just "one more" thing I need to add. If you know what FILES.BBS means, you have an idea what I'm adding now 😎
Read more here: Photo gallery 🖼️