You can remove the ‘out of stock’ products from your product feed using Product Feed Manager For WooCommerce.
Here is how you can do it:
Go to Product Feed Manager For WooCommerce on your WordPress Dashboard.
Select one of your existing feeds by choosing All Product Feeds or click on Add New Feed to create a new feed.
Go to the Products section.
Select Custom Filter.
This section will appear.
Here you can set the rule to exclude the ‘out of stock’ products from your feed.
Set Availability on the If Field.
Set Contains on the Condition field.
Input ‘Out’ or ‘out’ on the Value field (This is not case-sensitive).
Set Exclude on the Then field.
Now generate the feed for your desired merchant and update it.
Your feed will generate without the ‘out of stock’ products of your store.