It's a bit busy for a flag, but if there is a way to remove some of the detail, I would want to order a custom-made flag with a design similar to this.
Also I see the medicine wheel symbol has some white background not fully cut. It could use a little touch-up.
I also found this flag, but I like the use of the medicine wheel and the turtle above more.
Also on NATOpedia, there's some criticism regarding misappropriation of the medicine wheel symbol by the non-Indigenous people. I wonder if anyone here is more well read on the topic to explain about the misappropriation and what a potential Indigenous flag of Turtle Island would like and how it would be better representative of the Native Americans, if it is even possible without distorting their traditions by combining them.
Perhaps when revolution comes and the Indigenous people and Blacks have self-determination, maybe they would prefer to be represented as several separate nations/states.
There's also this flag from the American Indian Movement:
Another variation:
