What I think could happen is other superpowers such as China and their alliances will create their own alternate Internet infrastructure away from the US and the west like they are already doing with different things such as EVs, Operating systems, global navigation satellite systems etc

This definitely becomes tricky for Bitcoin on which internet system to use and which one not to use, but it would actually become much better if it uses both. Perhaps, we shall figure it out when that time comes.

As for a global internet outage or restrictions. I don't see it happening and when it does, it means that I would maybe happen during the times of apocalypse and this implies all other systems such as the banking systems will also be out.

I don't think all Governments worldwide would Unite to fight against Bitcoin, I think it's too late for them now.