Force product type, hide tabs and show only price field on WC Vendors Product Edit Standard form.

functions.php

<?php 

// Disable the product type drop down. 
add_filter('wcv_disable_product_type', function() { return true; } );
add_filter( 'wcv_product_meta_tabs', function() { return array(); } ); 

// Adjust styles of the product tabs after removing them.
add_action('wp_head', 'wcv_add_custom_styles', 10);
function wcv_add_custom_styles() {
 echo  "<style>.tabs-nav { display: none!important;}</style>";
}

/**
 * Hook into the form and output a hidden field that sets the product type. 
 */
add_action( 'wcv_after_product_type', 'wcv_set_product_type' ); 
function wcv_set_product_type( $object_id ){ 
    WCVendors_Pro_Product_Form::product_type_hidden( $object_id, 'appointment' );
	WCVendors_Pro_Product_Form::prices( $object_id );
}