filter/option to only sync products if images exist

Hi,

Is there a hook/filter or option I could use to only sync products once they have images uploaded to them?
We use an integration that syncs our product images separately to the products being created, which creates a problem that when these new products sync to facebook they’re listed without images for up to a day. It’s not a good look for our FB feed and shop and numerous customers have pointed out the issue to us.

thanks,
mik