GGB You still need a proper food-business licence and the standard food-safety approvals — a cloud kitchen is not a way around regulation. The trade licence typically goes through the Department of Economy and Tourism or the relevant free-zone authority, with Dubai Municipality food and premises approvals on top. Requirements change, so confirm the current ones with the relevant authority for your setup.
From Cloud Kitchen Setup in Dubai: Costs, Licensing and the Real Economics — the full reading, with the method behind this answer.