The definition of a golden share is effective control. Tell me how that and the following is going "on to explain the ways in which it isn't".
ByteDance was founded in 2012 in Beijing by Zhang Yiming and Liang Rubo, who were college roommates at Tianjin’s Nankai University, according to company information and Zhang’s public speeches.
It has been based in the Chinese capital since then. In 2021, Zhang announced he would step down as CEO of ByteDance and handed the reins to Liang.
The US government has the power to kill Huawei if they wanted to; it's their territory and they can do whatever the heck they want, of course. That doesn't mean Huawei is US-owned.