Thanks for reaching out - sorry for the delay in responding. It ended up in my spam folder...
Some Makivvik staff, including President Pita Aatami, discussed this on Facebook and on some community radio stations.
⏰Important announcement: Time Change in Nunavik⏰
This is an important clarification regarding the upcoming time change. Nunavik will be going ahead with the time change this weekend, and next year will mark the shift to year-round Daylight Saving Time.
Don’t forget to turn your clocks back on Sunday! Nakurmiik!
As for the logistics of where Makivvik is at with making it officially with TZDB, that's something I can't speak to.
But I am curious to hear where this ends up, so if things change, do let me know.