Hopefully you found a solution for this, for anyone else that’s looking, the datapicker field is a field that’s inserted by the jquery datepicker add on, the actual ACF field is hidded and the value of that field is updated by the JS that runs the datepicker.
When targeting ACF fields like this use ‘[data-key=”field_570d7682a7be5″]’ to target the fields inside the div. You can target the field ID if you are looking to modify the hidden ACF field
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