Currently, the only way that I can see this might be done is by adding custom JavaScript to the page to turn on autocomplete on some fields after the page loads. I’m not 100% sure how you’d do that. https://www.advancedcustomfields.com/resources/adding-custom-javascript-fields/
This is only a guess:
jQuery(document).ready($) {
// the field key of your field
$('[data-key="field_1234567"] input').attr('autocomplete', 'off');
}