Yes, what is the point if the cites you have are all based on speculation and vague allegations by US officials? Do you actually have credible evidence that a group affiliated with the Chinese government hacked American ISPs? If not, don't bother.
> the cites you have are all based on speculation and vague allegations by US officials
Totally untrue. It was also confirmed by officials from affected companies as well as Cybersecurity monitoring companies. There is quite a bit more detail and substantiation -- even in the Wikipedia article -- than you are acknowledging.
CISA does. Much of it has been made public.
Google it yourself, if you're actually interested. It's fascinating.