You are moving the goalposts. You asked what are killer sideloaded apps that users suffer from not having, I gave you examples, you started deflecting.
Oppressive governments are not interested in sideloading, quite the opposite - they very happy with Apple's policies so far, as Apple readily removes any app that the governments asks them to remove.
It's not moving the goalposts because "apps banned by the government" are not apps that will be available through side loading. If Apple complies with the DMA, it will certainly comply with any government requirement that side loading not allow for certain apps to be installed.
This is nonsense. If the OS allows sideloading, users typically can install ANY app via sideloading. Like you can install telegram on your macOS in that very same China that bans it for iOS devices. Why? Because sideloading means no one has control what should work on device but the user. And this is essential if you live under the oppressive government.
Again, I don’t know how I can make this clearer: macOS with a sealed system volume is plenty capable of keeping an app from running, ever. That Apple doesn’t enforce it is a concession to the history of the platform. It’s very unlikely they allow exemptions to notarizing on iOS, and the DMA doesn’t require it. DMA only requires that Apple allow apps to be distributed outside their App Store.
If Apple even attempted to do whatever nonsense you're suggesting, their market share would plummet to zero very quickly. Users just won't accept not being able to use their devices as they see fit. All serious developers would leave and then all that left would be just an iPad with keyboard. And no platform ever survived without developers.
This is obviously untrue, because what I described is already the case, and Apple is the most successful consumer electronics maker. They don't care about market share, they care about owning the most profitable customers in the market, which they do.