Hi @linuskom,
I hope you are well today and thank you for your question.
You can try achieving this by adding the following code in the functions.php file of your child theme.
/**
* Header menu (should you choose to use one)
*/
function sparkling_header_menu() {
echo '<img class="pull-right" height="100" width="200" src="https://cdn3.colorlib.com/wp/wp-content/uploads/sites/2/colorlib-logo-top.png">';
// display the WordPress Custom Menu if available
wp_nav_menu(array(
'menu' => 'primary',
'theme_location' => 'primary',
'depth' => 2,
'container' => 'div',
'container_class' => 'collapse navbar-collapse navbar-ex1-collapse',
'menu_class' => 'nav navbar-nav',
'fallback_cb' => 'wp_bootstrap_navwalker::fallback',
'walker' => new wp_bootstrap_navwalker()
));
} /* end header menu */
Just change the img tag attributes and image src with your Telephone Image in the above code.
Best Regards,
Movin