IFRAME Embed Google calendar

Hello @driftmaps

Please provide more details. How do you show a google calendar? Do you use a shortcode or JavaScript code to add an iframe? Or you just add a raw HTML? Take a screenshot with the field settings if possible.

Note that <iframe> HTML tag is not allowed content. The field content is sanitized using the wp_kses_post function. This function filters content with allowed HTML tags and attributes. You can use the wp_kses_allowed_html hook if you wish to extend allowed HTML tags. See example below.

// Allow <iframe> in content.
add_filter( 'wp_kses_allowed_html', function( $allowed_html, $context ) {
	if ( 'post' === $context ) {
		$allowed_html['iframe'] = array(
			'allow'           => true,
			'frameborder'     => true,
			'loading'         => true,
			'name'            => true,
			'referrerpolicy'  => true,
			'sandbox'         => true,
			'src'             => true,
			'srcdoc'          => true,
			'title'           => true,
			'width'           => true,
			'height'          => true,
			'allowfullscreen' => true,
		);
	}
	return $allowed_html;
}, 10, 2 );

Regards