Even if I’m a bit skeptical how “democratic” some of these were (since the prevalent ideology pre enlightenment in europe was that the demos wasn’t actually capable of conducting policy) and how much e.g. germanic things of all things would have influenced central and western european thought that much

Yes, goodness me, how silly thinking that Germanic institutions might have influence on Central and Western Europe, which were filled with Germanic-derived states.

(especially rince enlightenment philosophers usually referenced ancient greece - which actually didn’t really favour our notion of democracy).

What.

I’m still a bit baffled that you would consider it ridiculous that native American thought didn’t have any input on the enlightenment over 100 years after europe has discovered

Why would it? Ethnographic studies of Native Americans were not of considerable interest to European philosophers at the time. And certainly not accurate ones.

these people in that new continent had quite remarkably similar thoughts on liberty and equality as the enlightenment had.

... did they? SOME of them practiced democratic forms of governance. But unless you're going to argue that the rationalist, social-contract style thinking of the Enlightenment was replicated amongst Native American tribes, I don't really know how much similarity there is in the thinking beyond the commonality of all democratic polities, in Africa, Europe, Asia, and the Americas.

Also: the native Americans were right there, the founding fathers knew of their great law of peace and the US congress has even passed a resolution on how that great law of peace had influenced the US constitution.

Yes, I am well aware that the Founding Fathers knew about Native Americans and their forms of governance; that has very little to do with the Enlightenment-era ideals that predominated in the thinking and execution of the foundational documents of the USA.