Only if the exact role has been officially appointed, recorded, and approved for public use.
Interest in leadership is not leadership. Nomination is not appointment. Contribution is not office. Subscription is not title. Payment is not authority.
If you are being considered for a role, use careful language:
I have expressed interest in supporting the [Country] GRA-related National Stewardship Council pathway. No leadership appointment is implied.
If you are appointed, use the exact approved title and include any required limitation. For example, a title may be national, provisional, interim, workstream-specific, observer, or preparation-stage only.
Do not use titles that imply government representation, board authority, financial authority, underwriting authority, investment authority, or public authority unless such authority exists and is recorded.