This is a wonderful, but debated, topic. There has been some discussion in the past. Here is one topic. I posted some links to other topics within the forum in my reply.
Angela’s Symposium, run by Doctor Angela Puca, University Lecturer and PhD in Anthropology of Religion, believes it would be best to decouple indigenous religions from indigenous people, but she says scholars are still debating the issue. The attached YouTube video lists her references for further research.
While I personally don’t believe smudging itself is wrong, I do agree with those who believe we should stay away from White Sage due over-harvesting impacting indigenous groups.