Specific land claims are much more common that comprehensive land claims, but can still take many years and much cost to settle. In 2019 the Blood Tribe, located in Southern Alberta, won a massive land claim battle over land that was not included in the initial Treaty 7. View 'Blood Tribe wins massive land claim battle in Federal Court'
Specific land claims are so common due to a number of reasons:

In 2019 the Blood Tribe, located in Southern Alberta, ended a massive land claim battle over land that was not included in the initial Treaty 7. Read the process involved in this land claim. The outcome was determined in 2019; read how that resolution came to be.
Take the time to review the Government of Canada's information page on Specific Claims involving Land.