It is unclear who is a steward, how to become one, and why you would need one.
Define a steward election process, and gather input from DAO working groups on candidates and role description / scope. Make this the top priority of the DAO until completed.
https://docs.ens.domains/v/governance/governance-proposals/ep4-social-proposal-creation-of-foundational-working-groups-and-working-group-rules#specification