Orange-red aperitivo is the generic term for Luxardo Aperitivo, Aperol, and many other similarly coloured and flavoured liqueurs. See https://www.diffordsguide.com/beer-wine-spirits/category/1289/bittersweet-orange-red-aperitivo/aperitif-liqueurs
Alles klar! Thank you for clarifying my ignorance! And thank you for this amazing website, book etc. We owe you so much 🙏