Filter Time series data by category Type

I have a NAPLAN PowerBI Report with a time series visual where I need to display two different categories:

- Non Government School &

-Government school

And show their Naplan Results for 2018 through to 2023.  On the visual shown below, I would like to use a filter to show Government and Non-Government separately if possible.

pbix file here:

Dataset 

I would like to display as one graph preferably (like image 2) but I need to be able to filter on Government/Non-Government and unsure what settings are required to do this.

Image 1 - using Small Multiples

Image 2 - this is how i want it to look but i can't work out how to connect to an existing filter I have in place on the Page (which is working for other visuals).