In the Bricks Facebook group a user asks:
my end goal was to create a set of cards that would display the Users that are in an ACF User field as a set of cards for my employee directories.
This Pro tutorial provides the steps to set the Bricks query type to the built-in Users, enable the PHP query editor and add the PHP code for setting include parameter to an array of selected user IDs for the current post.
CPT: department
Custom field: staff_members (user) with Select Multiple enabled and Return format of array.
When editing a specific Department post:

After implementing the tutorial:

Step 1
Edit single Department template with Bricks.
Inside a Section’s Container, add a Block and enable query loop.
Enable PHP query editor and paste:
// Get the selected staff members from ACF field
$staff_members = get_field( 'staff_members' );
if ( $staff_members ) {
return [
'include' => wp_list_pluck( $staff_members, 'ID' ),
'orderby' => 'display_name',
'order' => 'ASC',
'number' => -1 // Return all matched users
];
} else {
return [
'include' => [ -1 ],
'number' => -1 // Return all matched users
];
}
Add a h3 Heading inside the Block set to
{wp_user_display_name}
Add any other elements as needed and map them to user-related Bricks’ dynamic data tags.