Hello,
You can use this hack to do so, thought setting $_GET like this is not considered as good practice.
add_action( 'wcfmmp_store_lists_before_sidebar_location_filter', function() {
if ( ! isset( $_GET['wcfmmp_store_country'] ) ) {
$_GET['wcfmmp_store_country'] = 'IN'; // Change it to any country you like (Two letter country code)
}
add_filter( 'wcfmmp_is_allow_store_list_country_filter', '__return_false' );
} );
Add this code to your child theme’s functions.php
In case you do not have child theme then add code using this plugin – https://wordpress.org/plugins/code-snippets/
Let me know how this goes.
Thanks!