Custom Static Fields Woocommerce Product Page - php

Question

I wanted to add a Custom Field to WooCommerce. The field is supposed to be plain Text Field.
Then it should be displayed on the Frontend. Unfortunately, I didn’t find such a Text Field Code Snippet. But the Code below worked:
/**
* #snippet Display RRP/MSRP # WooCommerce Single Product Page
* #how-to Get CustomizeWoo.com FREE
* #author Rodolfo Melogli
* #compatible WooCommerce 5
* #donate $9 https://businessbloomer.com/bloomer-armada/
*/
// -----------------------------------------
// 1. Add RRP field input # product edit page
add_action( 'woocommerce_product_options_pricing', 'bbloomer_add_RRP_to_products' );
function bbloomer_add_RRP_to_products() {
woocommerce_wp_text_input( array(
'id' => 'rrp',
'class' => 'short wc_input_price',
'label' => __( 'RRP', 'woocommerce' ) . ' (' . get_woocommerce_currency_symbol() . ')',
'data_type' => 'price',
));
}
// -----------------------------------------
// 2. Save RRP field via custom field
add_action( 'save_post_product', 'bbloomer_save_RRP' );
function bbloomer_save_RRP( $product_id ) {
global $typenow;
if ( 'product' === $typenow ) {
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return;
if ( isset( $_POST['rrp'] ) ) {
update_post_meta( $product_id, 'rrp', $_POST['rrp'] );
}
}
}
// -----------------------------------------
// 3. Display RRP field # single product page
add_action( 'woocommerce_single_product_summary', 'bbloomer_display_RRP', 9 );
function bbloomer_display_RRP() {
global $product;
if ( $product->get_type() <> 'variable' && $rrp = get_post_meta( $product->get_id(), 'rrp', true ) ) {
echo '<div class="woocommerce_rrp">';
_e( 'RRP: ', 'woocommerce' );
echo '<span>' . wc_price( $rrp ) . '</span>';
echo '</div>';
}
}
The problem is that this Code is for Price. I needed something that is just plain Text, plus a few adjustments.
I want:
Title: PRODUCT YEAR
Field Type: Text Field
And when it is displayed, Title should be in Bold Font.
How can I make these happen?
Regards.