I just purchased the plugin from @minimumstudio
Unfortunately, I cannot find any documentation on how to save the rearranged RG into the database.
Specifically, when the page is refreshed or reopened, the sorting order should be updated accordingly.
The demo has a save button, but I’m not experienced enough to reverse engineer it. Here’s the link to the demo: Drag & Drop Repeating Group.
Any help would be greatly appreciated.