I'm still reading between the lines here, which is frustrating and doesn't reflect well on the journalism; So you say:

"AWS announced in late 2018 the EC2 A1 instances, featuring their own AWS-manufactured Arm silicon"

...

"AWS during its annual re:Invent conference announced the availability of their new class of Arm-based servers, the M6g and M6gd instances among others, based on the Graviton2 processor."

So the Graviton2 is made by Amazon as well? Under licence from ARM, I mean, like other ARM design chips.

_edit_ Looks like it, yes. Here is the context necessary to understand the story:

https://www.wired.com/story/new-amazon-chips-cloud-computing...

https://www.nasdaq.com/articles/amazon-amzn-to-release-new-s...