According to the Article, why is Indigenous Peoples' Day taking hold as a holiday in the U.S.?

It's a chance for Indigenous people to bring rattles, drums, and flutes to celebrations across the continent.
It's a chance for Indigenous people to celebrate their cultures after years of loss and hardship.
It's a chance for the millions of Indigenous people living in the U.S. to join in a Round Dance together.
It's a chance for Indigenous people like Derrick Lente of the Sandia Pueblo Nation to become state lawmakers.

Indigenous Peoples' Day is taking hold as a holiday in the U.S. because it is a chance for Indigenous people to celebrate their cultures after years of loss and hardship.