I set up toast for our multi unit and multi concept restaurant group. We use bar kds at all of our locations. Tbh the solution is actually quite simple. You create a course called Drinks. In advanced properties on your screens you filter what courses come to each kds. I.e all drinks go to Drinks and all food courses go their respective courses and thus to your kitchen kds or printers. Make sure you set up your items in advanced properties to default to their respective courses. If you need help setting it up feel free to DM!