Create title using custom dynamic variables

Hello,

Thank you for contacting the support.

You will have to register custom variables to achieve that. This filter is used to register a custom variable: https://rankmath.com/kb/filters-hooks-api-developer/#add-extra-variables

Below is an example that registers a variable %get_current_date% which returns the current date:

add_action( 'rank_math/vars/register_extra_replacements', function(){
    rank_math_register_var_replacement(
        'get_current_date',
        [
            'name' => esc_html__( 'Current Date', 'rank-math' ),
            'description' => esc_html__( 'Gets current date.', 'rank-math' ),
            'variable' => 'get_current_date',
            'example' => 'get_current_date_callback()',
        ],
        'get_current_date_callback'
    );
});
function get_current_date_callback(){
    $date = date("j F Y");
    return $date;
}

You will need to fetch your variables var_counrty and var_championship in the callback function and return their values.

Here’s a guide you can follow to add the filter:
https://rankmath.com/kb/wordpress-hooks-actions-filters/

Once the variables would be registered, you would be able to use them in the title/description fields.

Hope that helps.

Thank you.