@omar
Omar,
It depends on the add-on or plugin, and what the functions of that add-on/extensions or plugin is.
Most need to have fields built into the WC Vendors Pro front end forms in order for those options to show up. Sometimes this can be simple; other times, not so much (if it involves a date picker, for instance, it can be more complicated).
If the plugin affects the transaction/financials, it will sometimes require a full integration which can get very complicated due to commissions. Most of the time with plugins the vendor will not be recognized, and the payment will go to the admin.
These plugins are built for a single store- so often they need to be integrated somewhat so that the vendor role is recognized.
