Display a collection grouped by its multi-reference field

Hi all,

I’m trying to nest two collections: Posts and Tags. Posts have a multi-reference field connected to Tags so I’m able to display all posts, each with their tags. But is it possible to display the tags collection and for each tag item, display all posts containing that tag? I know I can filter posts by a specific tag but I want to configure it such that if a new tag is added, a new tag section is automatically generated containing all posts with that tag. This is what I’m going for.

Here is my public share link: LINK
Here is my live site link: LINK

Thanks!