By default, the week view will show 3 multi-day events at the top of the grid. If there are more for the given week, those will be hidden and can be revealed with a toggle on the left side of the grid.

It is possible to change the default number with the help of the filter. The example below will change it to show 5 multi-day events.

add_filter( 'tribe_events_views_v2_week_multiday_toggle', function() { return 5; } );

Add the code snippet to the functions.php file of your theme, or use your preferred method for integrating snippets into your WordPress site, such as the free Code Snippets plugin.

The snippet above will produce the following outcome: