Duplicated register forms

Hi,

By default, the shortcode [mb_user_profile_register] displays 4 base fields to register a user: Username, Email, Password and Confirm Password. If you want to create more user meta, you can add the meta box id to the shortcode.

For more information, please follow the documentation.
https://docs.metabox.io/extensions/mb-user-profile/#registration-form

Hi,

You can use the filter hook rwmb_profile_register_fields to modify default fields of the register form. Follow my sample code

add_filter( 'rwmb_profile_register_fields', 'add_more_register_fields' );

function add_more_register_fields( $fields ) {
    $new_fields = [
        'phonenumber'  => [
            'name'     => __( 'Phone Number', 'mb-user-profile' ),
            'id'       => 'phonenumber',
            'type'     => 'number',
        ],
    ];
    $fields = array_merge( $fields, $new_fields );
    return $fields;
}

and here is the result https://share.getcloudapp.com/P8uEJzqr.

For more information, please follow the documentation https://docs.metabox.io/extensions/mb-user-profile/#form-fields-filters.