Make Italia default selected country for country and estate dropdown Add On.

make_italia_default_selected_country.php

<?php

function make_italia_default_selected_country() {
	global $pmpro_pages;

	if ( is_page( $pmpro_pages['checkout'] ) ) {
		?>
		<script>
			//Dom ready
			jQuery('document').ready(function($) {
				$('#bcountry').val("IT");
				$('#bcountry').trigger('change');
				//Remove line below if you don't want to hide country selector.
				$('#bcountry').closest('.pmpro_checkout-field-bcountry').hide();
			});
		</script>
		<?php
	}

}

add_action( 'wp_footer', 'make_italia_default_selected_country', 10 );