To add a Saved Section into Product Additional Info, you can follow these.
#1. Create a Page in Not Linked.
Use Name/URL: Saved Section – /saved
#2. Edit Page > Add a Section > Choose Saved Section
#3. Edit Additional Info
#4. Add a Code Block
#5. Paste this code into Code Block
<div data-wm-plugin="load" data-target="/saved"></div>
#6. Install this plugin
Plugin will give you some code to Code Injection > Header
and Footer
