Custom Sidebar

Hello,

I’m following the tutorial at the following link which adds custom fields that can insert custom widgets per page / post into the sidebar.

https://www.designly.net/blog/dynamically-register-new-sidebars-in-wordpress-with-advanced-custom-fields/

I can follow the option to insert custom fields, but I don’t know where to place the actual HTML code that creates each widget (title, design, appearance).

Any help on this would be super useful