The register
The register lists Project Twenty One Limited in London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Its rating on the register is Worker (A rating).
Companies House lists it as Project Twenty One Limited, number 14949728, incorporated 2023: 3 years of filings behind the name. Registered office: Unit 3b Berol House, 25 Ashley Road, London, N17 9LJ, N17 9LJ. Its filed activity puts it in wholesale.
A licence says an organisation may sponsor; it does not say it is hiring today. The way to find out is the same as for any employer: the careers page, the job boards, and a direct approach with a UK-style CV that says early that sponsorship would be needed.