Well, RTL now owns Sky Deutschland, and the UK is no longer subject to the European Commission due to Brexit, the only notable services that Sky has in the rest of Europe are Sky Italia and the SkyShowtime streaming service. This is why I think such a merger would be cleared.
There's a lot of Sky-named assets around the world, that use the current branding or have their own, none of these are owned by what is going to be NBCUniversal, these just have a licensing agreement or was connected to the British Sky in the past, even Foxtel in Australia was Sky not in name only.
So in reality, Sky will just be Canal+, plus Italy in the EEA area, the SkyShowtime streaming service isn't that notable, it only exists in some countries due to a lack of NOW/Peacock and Paramount+, also it's a joint venture with Paramount, so NBCUniversal won't own all of it anyway.