How can I add a chat app to a custom page template?

Store Design
1

I have created a new blank page template to add some custom html, following some answers form this other thread.

https://community.shopify.com/c/shopify-design/how-to-create-a-blank-page-with-no-header-footer-or-background/m-p/1551971

Now I’d like to add the shopify inbox app to this page template, but I can’t find a way to do this. Any tips?