As I see this is planned for v1.5, we are at 1.3 at the moment.
By the way: Attachments are not scaled (size) correctly. In my Android app it is croped in height.
Switched to Classic app (it works there), as we really need this feature.
Like you found in our road map, that feature has been bumped back a few times to make way for other improvements, particularly performance ones. Last I checked, it’s looking like I’ll have time to work on it for 1.5.
Also, do you have a screen shot of the behaviour you’re seeing with the attachment sizing? I can file a bug for what you’re seeing