Submit shipping costs and availability date with feed

Hello,

Our Google Ads partner told us there’s been an error with our feed during July, and suggested the shipping costs (7,90€ normally, free for 150€ orders and above) and availability date should be included with the product feed. I know the shipping costs can be set in Merchant Center settings and I have done so in the past, but somehow there was some kind of error that affected our campaign visibility.

With the plugin, how can I set the shipping costs and the availability date to go into Google Merchant Center automatically? Thanks!