How to Enable Manage Stock By Default And Some Other Problems

hi thanks for creating this very useful plugin
but i have some problems
1. How to Eliminate Virtual Options on Variable Products?
I used the code below, but it didn’t turn off the virtual option on the product variable

function disable_virtual_downloadable_support( $general_fields ) {
    if ( isset( $general_fields['is_virtual'] ) )
        unset( $general_fields['is_virtual'] );
    if ( isset( $general_fields['is_downloadable'] ) )
        unset( $general_fields['is_downloadable'] );
    return $general_fields;
}

add_filter( 'wcfm_product_manage_fields_general', 'disable_virtual_downloadable_support' );
add_filter('wcfmu_is_allow_downloadable','__return_false');

2. How To Enable Set Stock By Default With Quantity 1, Hide Option Set Stock (Keep Showing Stock Amount), Turn Off And Hide BackOrder Option.
Btw I use the following code, but it doesn’t work for variable product

add_filter( 'wcfm_product_fields_stock', function( $stock_fields, $product_id, $product_type ) {
	if( !$product_id ) {
		if( isset( $stock_fields['manage_stock'] ) ) {
			$stock_fields['manage_stock']['dfvalue'] = 'enable';
		}
		if( isset( $stock_fields['stock_qty'] ) ) {
			$stock_fields['stock_qty']['value'] = 1;
		}
	}
	$stock_fields = wcfm_hide_field( 'manage_stock', $stock_fields );
	$stock_fields = wcfm_hide_field( 'backorders', $stock_fields );
	$stock_fields = wcfm_hide_field( 'sold_individually', $stock_fields );
	$stock_fields = wcfm_hide_field( 'stock_status', $stock_fields );
  return $stock_fields;
}, 50, 3 );

thank you again, your help means a lot to me