<!-- logo -->
<div class="navbar-brand">
<?php if ( function_exists( 'the_custom_logo' ) && has_custom_logo() ) {
the_custom_logo();
} else { ?>
<?php
if ( is_front_page() && is_home() ) : ?>
<h1 class="site-title"><a href="<?php echo esc_url( home_url( '/' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a></h1>
<?php else : ?>
<p class="site-title"><a href="<?php echo esc_url( home_url( '/' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a></p>
<?php endif;
$description = get_bloginfo( 'description', 'display' );
if ( $description || is_customize_preview() ) : ?>
<p class="site-description"><?php echo $description; /* WPCS: xss ok. */ ?></p>
<?php endif; ?>
<?php } ?>
</div>
<!-- /logo -->
искать в шаблонах функцию the_custom_logo