The least plugins the better.

Lets say your RG holds Things. Add a custom state on the repeating group. This custom state is a list of Things.
Populate this custom state with your initial data, and make a workflow on the toggle button to add or remove the current’s row Thing to or from the custom state list.
You might need to re-create a toggle button and not use the bubble one.

When you need to save, save the custom state list of Things.

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