I need to get the selected option/s' label on each repeat.
I have tried getting onChange of the multi-select using the ff:
I'd need to build the same structure you have to test it, but in the meantime, could you please test the following?
Form.getRepeatData("data.dropdownMultiSelect_1", Form.getDisplayValue("id", data.$p))
Have you had a chance to test as per Julio's comment?