An Unknown British Officer, Probably of 11th (North Devonshire) Regiment of Foot, c.1800 John Hoppner (1758-1810)

The picture has something of this: people, portrait, wear, man, necklace, lid, veil, retro, helmet, vintage, outfit, jacket, wig, face, weapon.
Perhaps it’s a close up of a painting of a man in a red uniform with a white hair and wearing a red coat and gold trim around his neck.