I think you need to change the orientation on your device and save the photo file, then upload It again.
I dont think that there are any settings to play with once you upload it to SBO.
Alternately You could try to copy the photo to your device’s clipboard, and then try to “paste” it into your SBO message and see what it looks like.
Now you have whet our whistle…what are trying to post a photo of?
I am on Lake Michigan, and we had a 78 F degree day on the south end of the lake, and 15-20 knot winds from the south (so not too big waves close to the south shore…a great combo this late in October). I tested positive for,Covid this week so I am in quarantine, and decided it was too good of an opportunity to pass up…went out on a 20 NM solo sail, reefed jib only, top speed 7 knots!
Great day!
Forecast is about the same tomorrow but up to 35 knots of wind. May try to get one more sail in before haulout next Saturday (10/29/22).
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Greg