Counting number of posts with Category B in Category A

I’m currently building my own backlog tracker and have gotten to a point where I just have no idea how I’m going to do this.

I have multiple status categories (for example; beaten and completed) and categories for the consoles (for example PS4 and Nintendo Switch). Now I want to display how many games(posts) I have beaten (Category A) for the Nintendo Switch (Category B)

For Example; I have 66 games, 34 from those are from the Nintendo Switch.
From those 34 Switch games, I have actually beaten 24. I want to display this “24”.

can anyone give me an idea of where to go and how to fix this problem?

Make use of the WP_Query class, namely the tax_query and fields parameters. Get the count from the $found_posts property. Please note, this is exemplary code.

$query = new WP_Query( [
  'post_type' => 'games',
  'tax_query' = [
    'relation' => 'AND',
    [
      'taxonomy' => 'game_status',
      'field' => 'slug',
      'terms' => [ 'beaten' ],
    ],
    [
      'taxonomy' => 'console',
      'field' => 'slug',
      'terms' => [ 'switch' ],
    ]
  ],
  'fields' => 'ids',
] );

$count = $query->found_posts;