If you have added a new room type, but it is not appearing on the Grid, it could be because a room has not yet been added to the room type.
You can add a Room to the Room type by going to:
Settings > Rooms.
Find the room type not appearing on the Grid.
Click + Add rooms.
Enter your room name.
Click Add another room if you want to add multiple rooms (Optional).
Click Add rooms.
Once a room has been added to the room types, you will be able to see it on the Grid.