SUGGESTION: adding the ability to change the order of photos and videos after sending a message, at least in Saved Messages. Many bloggers and channel creators prepare and arrange their posts there first before publishing them to their channels.
THE PROBLEM is that only after sending a message it becomes clear whether the order of images or videos looks good. If you want to swap, for example, 5 photos with each other, you currently have to delete the message, select all files again in the correct order, and send it again. Sometimes this needs to be repeated several times until the composition looks right.
(Using the "replace" function in this case is not convenient, because you need to change a lot of photos many times. Replacing each photo manually by uploading a new one every time takes far too long and very inconvenient.)
This ability would greatly improve the post creation process.