Insert nofollow in a “Powered By” link, except in the homepage

I want to insert the nofollow value in a “Powered by” link if the page is different than the homepage.

So I have written this:

function prefix_poweredby() {
    if ( is_front_page() ) {
        $html = '<a href="https://example.com" target="_blank">link</a>';
        echo $html;
    } else {
        $html = '<a href="https://example.com" rel="nofollow" target="_blank">link</a>';
        echo $html;
    }
}
add_action('wp_footer', 'prefix_poweredby');

It’s working just fine, but I’m pretty sure that there are other more elegant ways to write this function and I would love if you could share with me.