API requests to `/api/v1/plotters/plotterparameters/` return nothing conditionally

What

Requesting the plotter parameters of the platform return an empty [] when requested by an anonymous user when the report is locked (EDIT: or if it's published).

Reproduce

Create a new report and add experiments
Add a plot
Save report
Lock report
View the report/publication URL
Look in the network activity panel of your browser's devtools, find the request for the plotterparameters
Since you are logged in, it correctly has fetched the plotter parameters
Copy report publication URL
Log out
View report publication URL
Look at the network panel again and find the request
Expected: The plotterparameters are returned
Actual: An empty [] is returned