Remove previously published macOS version of my app from the app store to replace it with iPad OS availability

Before Apple Silicon was a thing, I published a separate version of my iOS app for macOS. I'm no longer able to maintain this version, so I would like users to be able to use the iPadOS version of my app on Apple Silicon. Unfortunately I can't make it available through Prices & Availablity, because it says:

"Once your macOS version has been approved, your iOS app will no longer be available to Mac users." (translated from the German user interface)

How do I remove the previous version and publish the iPadOS version to the mac app store?