WP Snippet to hide and prevent users from changing account_display_name

Evening everyone. I tried to look around the web to find a solution to this but couldn't really find anything related. I just need to write a snippet that prevent users to change their display name by hiding the field in the "my account" page or any other smarter way possible. Thank you

From your question I can assume that you are using WooCommerce. You need to make a couple of things done to achieve it:

1. Remove account_display_name field from My Account template file:

Firstly, duplicate form-edit-account.php file

/wp-content/plugins/woocommerce/templates/myaccount/form-edit-account.php

to your child theme folder

/wp-content/themes/your_child_theme/woocommerce/myaccount/form-edit-account.php

Then open copied file and remove html markup and php code related to account_display_name field:

    <p class="woocommerce-form-row woocommerce-form-row--wide form-row form-row-wide">
    <label for="account_display_name"><?php esc_html_e( 'Display name', 'woocommerce' ); ?>&nbsp;<span class="required">*</span></label>
    <input type="text" class="woocommerce-Input woocommerce-Input--text input-text" name="account_display_name" id="account_display_name" value="<?php echo esc_attr( $user->display_name ); ?>" />
    <span><em><?php esc_html_e( 'This will be how your name will be displayed in the account section and in reviews', 'woocommerce' ); ?></em></span>
    </p>
    <div class="clear"></div>

2. Use woocommerce_save_account_details_required_fields hook to unset account_display_name field from the required fields. This is necessary to avoid validation error when saving changes on My Account page.

Place following php code into your child's theme functions.php file:

    add_filter('woocommerce_save_account_details_required_fields', 'remove_required_fields'); 
    function remove_required_fields( $required_fields ) {
        unset($required_fields['account_display_name']);
        return $required_fields;
    }