Custom Ultimate Member fields in WordPress User Admin Panel

um-user-admin.php

<?php
add_filter( 'manage_users_columns', 'um_custom_add_new_user_column' );
  
function um_custom_add_new_user_column( $columns ) {
    $columns['um_country'] = 'Country';
    return $columns;
}
  
add_filter( 'manage_users_custom_column', 'um_custom_add_new_user_column_content', 10, 3 );
  
function um_custom_add_new_user_column_content( $content, $column, $user_id ) {
    // Change the 2nd paramenter with your desired UM Meta Key
    if ( 'um_country' === $column ) {
        $content = get_user_meta( $user_id, 'country', true );
    }
    
    return $content;
}