CF can't change the room name in the room, only when creating the room, as shown below. First enter the firefight game and select a server, as shown in the figure. Then select a channel among them, as shown in the figure.
The default room name of CF can only be modified through the game directory. First find the directory of CF, then find the folder CrossFire \ rez \ UI \ Scripts, and then find roomname; The second and fourth lines inside are the default room names of CF; Just change it to the name you want to change.