To see all trading businesses under one dashboard you will need to create a different account for all locations with a unique CQC number. These accounts also need separate email addresses. Once created, you can add a "New user" to each business using the same email address. This user will then have access to all businesses via one dashboard.
We recommend that the initial set-up email be generic to the business, such as info@. You will then be free to use your personal work email as the all business overview user.
This will give you oversight of all locations from a single dashboard.