@christian-denatorange-fr Your code should work when the repeater field is used as a flexible content?
In my case, I have a layout with a selector and a repeater:
acf.addAction('new_field/name=preset', foo);
function foo(field) {
field.on('change', function() {
const repeater = acf.getField('field_page-builder_sections_row-module_row_columns');
let $row = '';
$row = repeater.add();
});
}
But nothing happens.