@vervoortyves In that case I wouldn’t connect the dateset to the repeater via the editor, but do everything with code.
first I’d get an array of all the items - dataset .getItems(0,1000)
Then I’d sort them using JavaScript .sort() method.
Bind the sorted data to the repeater using repeater.data
And use repeater .onItemReady() to connect the fields to the repeater elements.