You can export all your data including photos you post, but not sure about individually.

Yeah, don't get me started on that. The developer of Pixelfed is extremely easily distracted. Every time a promise is made to focus on the Pixelfed improvements or bug fixes, the following day he's working on something else. I feel guilty for complaining, because it's free and he's essentially a solo dev, but when users are being told one thing and they see something else, you tend to lose confidence. He's done amazing work, but there's a lot to iron out that hasn't seemed like a priority for a long time.

Yeah, I had the same experience, then saw more and more photos on my feed coming from vernissage.photos and had another look. Yeah the HDR feature and EXIF info is great.