Only hide site header/footer if the homepage is set to a static page.

seedlet/template-parts/footer/footer-content.php

@@ -1,4 +1,4 @@
-<?php if ( ! ( true === get_theme_mod( 'hide_site_footer', false ) && is_front_page() ) ) : ?>
+<?php if ( ! ( true === get_theme_mod( 'hide_site_footer', false ) && is_front_page() && is_page() ) ) : ?>
 	<?php get_template_part( 'template-parts/footer/footer-widgets' ); ?>
 	<?php get_template_part( 'template-parts/footer/footer-menu' ); ?>
 <?php endif; ?>

seedlet/template-parts/header/header-content.php

@@ -6,7 +6,7 @@ $header_classes .= true === get_theme_mod( 'display_title_and_tagline', true ) ?
 $header_classes .= $has_primary_nav ? ' has-menu' : '';
 ?>
 
-<?php if ( ! ( true === get_theme_mod( 'hide_site_header', false ) && is_front_page() ) ) : ?>
+<?php if ( ! ( true === get_theme_mod( 'hide_site_header', false ) && is_front_page() && is_page() ) ) : ?>
 	<header id="masthead" class="<?php echo $header_classes; ?>" role="banner">
 		<?php get_template_part( 'template-parts/header/site-branding' ); ?>
 		<?php get_template_part( 'template-parts/header/navigation' ); ?>