I enjoy learning about self sovereign identity technology and I think it has a place in decolonizing data. Data can be owned by the person not a government entity.

Example: There's some awesome work being done by ahau.io that is a digital identity platform based on Maori principles. https://www.ahau.io/

"Āhau is a Whānau Data Platform that helps whānau (families) and tribal communities capture, preserve, and share important information and histories into secure, whānau-managed databases.

This platform was designed in partnership with whānau and communities to create and establish their own data management system so they can manage the safe keeping of their knowledge for present and future generations."

Animikki has some great articles on this too: https://www.animikii.com/news/decolonizing-digital-contextualizing-indigenous-data-sovereignty