it probably depends.
I was in contact with supervisor. Supervisor is a boss who controls few delegations in one region (few huge provinces in my case). No idea are supervisors
really involved in every each case, I doubt and the one I was in contact with told me
no. I personally reached supervisor as I was bugging DNM a lot (like A LOT haha) and that`s why he learned about me and my case.
If one has a resolution that stating he/she is a resident it`s almost the end, congrats. Mine was signed by delegado (head of local delegation). When I looked at full file there was no trace of supervisor at this point, if it is signed- it is done and passed to Renaper. You can request your file from DNM and see everything that was going (thanks bajo for this advice) and you can learn why they asked for supervisor for your case.
After I got the resolution in almost no time I got DNI number and digital DNI, lduring same day or so. Fin