That was the case in the past but it’s not true anymore. China is just the best in a lot of sectors and also oftentimes the only one who can produce certain things. Here’s a video where someone tried to make a product in the US only, it explains a lot of that: https://youtu.be/3ZTGwcHQfLY

The BlueSky protocol relies on central servers tho, I’m not sure if there’s much that ActivityPub can take inspiration from

We have that, it’s called ActivityPub. BlueSky wouldn’t want that tho, they couldn’t control the entire network then, after all.