Add placeholder help text to the details text field area when requesting a payout

How can I add placeholder help text in the details text area when requesting a payout. See screenshot.

Request a Payout|525x499

Please try this PHP snippet

add_filter(
	'hivepress/v1/forms/payout_request',
	function($form){
		if(isset($form['fields']['details'])){
			$form['fields']['details']['description'] = 'custom text';
		}
		
		return $form;
	},
	1000
);