Are they doing that in this case? The DMA is not targeted at Apple specifically. The clarifications linked by Gruber are - and I would assume that there are similar clarifications for other companies' products as well (especially if those other companies raised as much stink in the press as Apple does).

I also assume Microsoft, Sony and Nintendo would also face more targeted regulatory attention if their consoles were as ubiquitous and utility-like as smartphones are (MS certaintly has for Windows). I would even assume that a company could accelerate this process by being as persistent and public as Epic is in regards to Apple.