Creating custom link that redirects to a another link

Question

First, create a page with the intended URL slug and note down the ID of it. Then in your functions.php

function wpse410694_custom_redirect() { 
    //Let us assume the ID of the page is 123
    if ( is_page(123) ) {
        wp_redirect( 'drive.google.com/myCustomPDF_Link' );
        exit;
    }
    
}
add_action( 'template_redirect', 'wpse410694_custom_redirect');

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