1. 2 Tạo mẫu thủ công (ok)

C:\xampp\htdocs\wp-content\themes\emptytheme\templates\index.html

<!-- wp:template-part {"slug":"header"} /-->
 
<!-- wp:template-part {"slug":"footer"} /-->

C:\xampp\htdocs\wp-content\themes\emptytheme\parts\header.html

<!-- wp:site-title /-->

C:\xampp\htdocs\wp-content\themes\emptytheme\parts\footer.html

<!-- wp:paragraph {"align":"center"} -->
<p class="has-text-align-center">
    Proudly powered by <a href="https://wordpress.org/">WordPress</a>.
</p>
<!-- /wp:paragraph -->