Combine modular with the blog in Grav

I’m trying to achieve something in Grav, but I cannot wrap my head around the logic.

I have a blog in Grav, which works great. I put these pages below the blog and the different posts are displayed like I want to.

Now I want to add a module, a simple form, where users can leave their name and email address so they get a notification with a new post.

But I checked the docs, and it looks like you cannot combine these pages and modular pages or do I miss something here?

Or do you need to do this manually and is it not possible with the admin Grav plugin?