Like many things in the US, this should be settled by congress not judges.

Things that everyone relies on for life are generally regulated by law. Telecom platforms for instance. I’d say the mandatory software platform I need for my bank, drivers license, daily communication, etc should be in this bucket.

The EU declaring both Apple and Google gateway platforms is a much better approach. Congress is abdicating its responsibility to craft the legal frameworks for equal access in the modern age.