The acf_form() and the acf_form_head() functions should be called in the region of your template where you want to display the form. The acf_form_head() function is used to process the form data.
Since the repeater makes use of repeating sets of row data, you might also need to a loop to get all the data that you want to set in your meta table. The have_rows() and the_row() functions are used to step through the row data.
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