Show filtered values (field parameter)

pbix 

Hello,

I have a small issue with my Power BI report.

In a matrix visual, I count the Account IDs from my Account table. In a table visual, I display the details of these Account IDs. I also have a Visits table, which I use to filter and visualize the accounts I have visited using the "Seen" parameter.

I would like to also see the accounts I haven't visited with the given filters on the Visits table. Ideally, my matrix visual should show "Seen" as "yes" and leave all other accounts as blank. This way, when I select the blank values in the matrix visual, it filters my table visual to display only the accounts I haven't visited yet.

Is this possible?

Thank you.
PS
Link to PowerBi on my github is above.
In reality my power bi looks like on the screenshot attached