Joe Rossignol at MacRumors has a report on several features that are only available to M1 macs.
None seem like deal breakers, and the Portrait Mode blurred background could be something with the cameras, which would mean not supported on M1 Mac Mini.
Apple has said they will continue to support Intel Macs for some time, but slowly removing features from Intel doesn’t really seem like full support, and gives doubt to rumors of a final Mac Pro with newer Intel Processor.