Yes. With the Cite Them Right Harvard style, if you have a corporate author, such as the British Broadcasting Corporation (BBC), or The Department for Environment, Food and Rural Affairs (DEFRA), and you are planning on citing them multiple times throughout your assignment, you can shorten it to its abbreviation. However,  you need to write the full corporate name the first time to cite it.

For example, your first in-text citation would look like: (The Department for Environment, Food and Rural Affairs (DEFRA), 2021)

Then after that, your in-text citations would be: (DEFRA, 2021). or  ...As you can see from DEFRA's delivery plan (2021)

Final reference: 

DEFRA (2021) Department for Environment, Food and Rural Affairs Outcome Delivery Plan: 2021 to 2022. Available at:https://www.gov.uk/government/publications/department-for-environment-food-and-rural-affairs-outcome-delivery-plan/department-for-environment-food-and-rural-affairs-outcome-delivery-plan-2021-to-2022 (Accessed: 11 May 2023).

However, if you are just citing it just the once in your assignment, then you would reference it with the full corporate name:

In-text citation: (The Department for Environment, Food and Rural Affairs, 2021).

Final reference:

The Department for Environment, Food and Rural Affairs (2021) Department for Environment, Food and Rural Affairs Outcome Delivery Plan: 2021 to 2022. Available at:https://www.gov.uk/government/publications/department-for-environment-food-and-rural-affairs-outcome-delivery-plan/department-for-environment-food-and-rural-affairs-outcome-delivery-plan-2021-to-2022 (Accessed: 11 May 2023).