Please help correcting the way to handle the DBI PER_PER_NI_ISSUING_COUNTRY.

We are trying to add a condition in onboarding checklist that will add a task for all people who have their national identifier issuing country other than Canada.

We are having existing conditions attached in the fast formula attached to the validation rule of the checklist, and would require to incorporate new condition in the same fast formula.
I was able to find the DBI to be used for the task - PER_PER_NI_ISSUING_COUNTRY(Desciption: Person National Identifier Issuing Country), but not able to fetch country correctly.

We want to use this "Text value and number index array" type of DBI item to fetch the issuing country name.