No. There is no sideloading at all.

Apple very begrudgingly allowed creation of alternative AppStores (marketplaces) instead, which are still completely under Apple’s technical control, and still go through Apple’s review.

Apple requires having a 1 million dollar credit line to allow opening a 3rd party AppStore, so consumers or small devs can’t just bypass Apple’s AppStore.

You still need a developer account and application to be signed by apple in order to be able to side load it. Whether that requirement is legal remains to be seen.

All side loaded apps still need to go through Apple notarization. It's malicious compliance from Apple.

They aren't actually allowing sideloading, but the ability to install "marketplaces", which can only be provided by verified developers under very strict rules regarding government. It's a huge disappointment.

I would think this is a money game where it will force Epic to become a European developer/entity instead of just an American developer, to access the DMA market.

More hoops and more BS is entirely on brand for Apfel in this exercise.