When get is added ahead of the loop, nothing is returned in the template. It should be noted that the query already has a tag filter applied in routes.yml as part of a collection.
Docker was restarted and the theme reloaded. For some reason, the result is the same.
Interestingly changing config.posts_per_page also appears to have no effect. The version also isn’t reflected in Ghost admin (just shows 1.0). Could it be that it’s not being properly loaded by ghost?