That's because they aren't what I asked for though to be fair Im also aware those sources do not exist because we haven't done those studies.
The fact that the Inuit traditionally have a much shorter lifespan is a fairly well documented fact. It's really hard living in the Arctic and it is extremely likely that you do need some plants to live a more normal life. You'll note it's never academics that bring them up as an example for how keto is "totes healthy" (again we don't know if it is for decades on end).
Fun fact they talk about pre-modern Inuit diets in your link but completely avoid the fact the Inuit died of natural causes substantially earlier than almost all cultures. It's weird how often those pushing keto reference the Inuit but avoid that bit. Modernity has changed this significantly so modern Inuit have similar lifespans to other people.
https://www150.statcan.gc.ca/n1/pub/82-003-x/2008001/article/10463/4149059-eng.htm