This bit on the Mac App Store page (Text Sniped):
Compatibility
Mac
Requires macOS 11.0 or later and a
Mac with Apple M1 chip.
iPad
Requires iPadOS 10.3 or later.
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I wonder if that is for running an iPad app on a Mac, and not a requirement that to use the iPad app a M1 Mac is needed.
Firing up the old iPad …