Dormant is a fact, not a status
There is no general switch you flip with the FTA to make a company dormant. A company is dormant in practice when it has no trading income and few or no costs. Its legal duties continue for as long as it holds a licence and tax registrations.
That includes licence renewal fees and documents, the beneficial owner register, and in some free zones annual financial statements at renewal. IFZA, for example, now asks every licensee for financial statements at each renewal, active or not.