DS embedded product was invented especially to enhance and make it easier to integrate it with other products. But in our case, you can just as easily create your rooms not just via integrations and API calls, but also from the UI itself.
In Rooms section of your account first you see list of rooms that you created:
That locker icon you see just tells you at first sight, whether your room is private or public.
In this case, you can change that status by clicking three-doted setting icon and clicking "Edit":
All the other sections related to in-room and branding features also can be adjusted here.
After doing the changes don't forget to scroll-down and click on "Update room" button.