Hello,
This is the method I use on my site
I put this in a kb article here:
https://www.wcvendors.com/kb/prevent-product-listing-vendor-no-stripe-account-connected-stripe-gateway-commissions/
and you can see the discussion in this thread:
Please note that if you are using the BuddyBoss Social Marketplace then you will have to add bb-marketplace to the path of your saved modified template: wp-content/themes/onesocial-child/bb-marketplace/wc-vendors/dashboard/product-edit.php