I've been using dayZ on rearmed for like a year and its been completely fine. The last detection was in 2020. I have been admin banned on a few accounts i've raged on but in terms of actual detection the cheat isn't detected at all.
Also, if you do post an application and pass and get verified then make sure you don't join the discord with the same discord you are in rearmed or lone survivor discords etc, there is an admin from rearmed in the discord somewhere who bans people if they have the same IGN as they do in proofcore discord or if they are in the proofcore discord and rearmed.