DMA is about increasing competition of app stores. It is not about giving "freedom" to people. Notorization is an independent process from running an app store on Apple's platform.
The key thing here is that the Apple App Store and third party app stores must be on an level playing field to compete on.
UTM wasn't denied notarization because some virus scanner found that it was a virus, but because it violated App Store guidelines. That's editorial control.