// Add field
function action_woocommerce_edit_account_form_start() {
    ?>
    

         *
        
    
    add( 'image_error', __( 'Please provide a valid image', 'woocommerce' ) );
    }
}
add_action( 'woocommerce_save_account_details_errors','action_woocommerce_save_account_details_errors', 10, 1 );

// Save
function action_woocommerce_save_account_details( $user_id ) {  
    if ( isset( $_FILES['image'] ) ) {
        require_once( ABSPATH . 'wp-admin/includes/image.php' );
        require_once( ABSPATH . 'wp-admin/includes/file.php' );
        require_once( ABSPATH . 'wp-admin/includes/media.php' );

        $attachment_id = media_handle_upload( 'image', 0 );

        if ( is_wp_error( $attachment_id ) ) {
            update_user_meta( $user_id, 'image', $_FILES['image'] . ": " . $attachment_id->get_error_message() );
        } else {
            update_user_meta( $user_id, 'image', $attachment_id );
        }
   }
}
add_action( 'woocommerce_save_account_details', 'action_woocommerce_save_account_details', 10, 1 );

// Add enctype to form to allow image upload
function action_woocommerce_edit_account_form_tag() {
    echo 'enctype="multipart/form-data"';
} 
add_action( 'woocommerce_edit_account_form_tag', 'action_woocommerce_edit_account_form_tag' );