Hello Luckystrike!
Thanks a lot for the tip, yes, the problem was the switch in this submenu, my voice chats were muted, I turned it on a long time ago, because I always used the "Party" on the PS5 with my friends. It's good that we understood what was going on, now there is information on the Internet for those who will face the same problem with their forgetfulness :)

Hello Luckystrike!
Сan you tell me what this function is and where it is? In the main menu of Arma or the menu of PS5?
I have a similar problem with voice chat in the game and I have already racked my brains not knowing what to do :)
You will simply save me and several of my friends with this problem.