Just to be clear, I'm not stating that Apple won't be able to moderate apps on their store. I'm stating that Apple won't be able to moderate apps on their operating systems.
The Gatekeeper must allow installation of applications (Article 4. S4):
> The gatekeeper shall allow and technically enable the installation and effective use of third-party software applications or software application stores using, or interoperating with, its operating system and allow those software applications or software application stores to be accessed by means other than the relevant core platform services of that gatekeeper. The gatekeeper shall, where applicable, not prevent the downloaded third-party software applications or software application stores from prompting end users to decide whether they want to set that downloaded software application or software application store as their default. The gatekeeper shall technically enable end users who decide to set that downloaded software application or software application store as their default to carry out that change easily.
There is no wiggle room here. The Gatekeeper can't restrict installation of applications in any way, including by way of certificate requirements, approval processes, or fees.
If you're a legal geek like I am it's worth spending a few hours combing through it. I am thoroughly impressed with how meticulous they've been. It's easily the most comprehensive (and impressive) tech legislation in my lifetime.
I especially love the idea that the DMA prevents Apple from moderating apps inside their store.
And no I didn’t edit my comment. Feel free to provide evidence of the others.