While I am not a Grok user or Elon defender at all (I am currently having to look for a new job thanks to DOGE), I'd argue this lawsuit and the DMA both arise from the same mindset. In fact, this is a great example of why I am so against regulations like the DMA.
iOS, Siri integrations, and the App Store are Apple products. Absent very good reason (and in my opinion, "I want to use Apple's IP to reach Apple's customers without paying Apple", “Apple doesn't let my app integrate with the system", and "Apple didn’t feature my app in the App Store” don't qualify as good reasons, let alone very good ones), regulators and courts shouldn’t compel access, integration, or ranking to Apple's products.
In my opinion, Apple's platform and products shouldn't be treated like public infrastructure that must give rivals equal access or prominence, and that applies whether it's the government trying to force it it or Elon trying to force it.