kkarpieszuk

Since version 5.6 Advanced Custom Fields plugin hides WordPress native interface to display custom fields on the posts 
edit screen.
If you are plugin developer, advanced WordPress user or you feel much better when you have custom fields at 
a glance, you probably would like to discard this change.
When you activate this tiny plugin, you will see the native custom fields interface again.

Native Custom Fields Meta Box and ACF

Show WordPress native meta box for custom fields when Advanced Custom Fields plugin is active

themesty

Sierra Addons add features to <a href="https://wpsierra.com/" rel="nofollow ugc">WP Sierra</a> theme: 
– meta boxes which gives you the ability to set pages transparent headers and alternative logo in header 
– Elementor widgets like: 
 * WP Sierra Button 
 * WP Sierra Posts 
– WP Sierra demo sites
IMPORTANT: this plugin requires <a href="https://wpsierra.com/" rel="nofollow ugc">WP Sierra</a> theme to be installed to work.

Sierra Addons

Plugin with extra features for WP Sierra theme.

Native Custom Fields Meta Box and ACF vs Sierra Addons