Trouble modifying template functions

Hi. I’ve tried the following functions to modify the header and footer.

function webby_storefront_credit() {
   ?>
   <div class="site-info">

         <?php echo esc_html( apply_filters( 'storefront_copyright_text', $content = '&copy; ' . get_bloginfo( 'name' ) . ' ' . date( 'Y' ) ) ); ?>

         <?php if ( apply_filters( 'storefront_credit_link', true ) ) { ?>

         <br /> <?php echo '<a href="https://s.doig.com.au" target="_blank" title="' .  '" rel="author">' . esc_html__( 'Built by Steve  ', 'storefront' ) . '</a>' ?> and <a href="https://www.webby.net.au" title="Webby Website Optimisation">Webby Website Optimisation</a>.

         <?php } ?>

   </div><!-- .site-info -->

   <?php
}

function webby_remove_footer_credit () {
    remove_action( 'storefront_footer', 'storefront_credit', 20 );
    add_action( 'storefront_footer', 'webby_storefront_credit', 20 );
}

add_action( 'init', 'webby_remove_footer_credit', 10 );
    
function webby_storefront_site_title_or_logo( $echo = true ) {
	if ( function_exists( 'the_custom_logo' ) && has_custom_logo() ) {
		$logo = get_custom_logo();
		$html = is_home() ? '<h1 class="logo">' . $logo . '</h1>' : $logo;
	} else {
		$tag = is_home() ? 'h2' : 'div';

		$html = '<' . esc_attr( $tag ) . ' class="beta site-title"><a href="' . esc_url( home_url( '/' ) ) . '" rel="home">' . esc_html( get_bloginfo( 'name' ) ) . '</a></' . esc_attr( $tag ) . '>';

		if ( '' !== get_bloginfo( 'description' ) ) {
			$html .= '<h1 class="site-description">' . esc_html( get_bloginfo( 'description', 'display' ) ) . '</h1>';
		}
	}

	if ( ! $echo ) {
		return $html;
	}

	echo $html; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
}

function webby_site_title () {
    remove_action( 'storefront_header', 'storefront_site_title_or_logo', 20 );
    add_action( 'storefront_header', 'webby_storefront_site_title_or_logo', 20 );
}

add_action( 'init', 'webby_site_title', 10 );

This code is in the functions.php file of the child theme, and the child theme is active.

However, the header and footer are still the same.

Help appreciated.