I only have cursory knowledge, but seeing a number of videos of player/ref interactions make me think that the authorities are interested in having a game that is both physical and cognizant of the possibility of long-term injury. The players are not wearing helmets, and the refs are OK with using video review (with the videos playing out on the stadium screens) for all to see. It’s very different from US football or worldwide soccer/football.

It talked about how the new mouthguard lights up "if the impact is severe enough to potentially cause a concussion". So, not just regular head impact it seems.

Then mentions that it's an update to the current "smart mouthguard" which uses Bluetooth, because with "the current system the alerts can take several seconds to reach the match day doctor.". So, it's not just about flagging something illegal but actually goes to match day doctors when the impact is severe. This new one let's people/ref know to wave a doctor over quicker/send them off

At the bottom they added that "the technology could also help identify instances of foul play."