Try this.
- Add a Joined List column to convert your multiple images column into a comma delimited list of urls. Name it Input.
- Add a Text column and name it Output.
- Add a Split Text column to convert Output into an array. (optional if you need the images as an array)
Once you have those columns, add a custom component with this prompt.
Bind Input, which is a comma delimited list of image urls. Split the urls and render them as an image gallery. Allow the images to be rearranged using drag and drop. Save the rearranged images as a comma delimited list of urls to bound to Output. If a new image url appear in the bound Input, add it to the end of the bound Output. If an image url is removed from bound Input, also remove the url from bound Output. Input and Output should be the only bound columns.