Can I have multiple listings for an app or component?

No, you can associate an app or component with only one listing. In addition, you can’t duplicate a package (or create a new package version) just to list the app or component in a new listing. This behavior is to your advantage, because it’s easier for you to maintain and upgrade the app or component over its lifecycle. It also helps your listing achieve a higher ranking in the AppExchange, because the metrics that Salesforce uses to rank apps and components, like page views, aren’t diluted across multiple listings.