The register
The register lists Ofsted in London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Rating on the current register: Worker (A rating).
At Companies House the business is Ofsted Limited (company number 11519800), a private limited company incorporated in 2018, 8 years ago. The registered office is at 59 Hepleswell Two Mile Ash, Milton Keynes, MK8 8LU, MK8 8LU. Its filed activity puts it in education.
What the licence tells a candidate is that the door is not locked. Whether it is open this month is a question for Ofsted's own careers page and the job boards, and the answer changes with the season and the order book.