Please don't make your own definition for open source 
I wasn't. I am just interpreting their own words "as open source as possible". According to my understanding of English, that doesn't mean fully/completely/100% open-source. I could be wrong, but that's what they said. The "as possible" part could mean anything. As much as the manufacturing company allows, as much as some license agreement (if there is one) allows, or something else. oh and you are quoting some old blog post from 2020,
and new information I heard confirmed what I am saying, but let's wait the end of 2022 and see, if we are alive and well by them.
I couldn't find anything newer about the topic. Can you post a link so I can check newer and updated claims?and new information I heard confirmed what I am saying, but let's wait the end of 2022 and see, if we are alive and well by them.