The league has released a new stats portal, giving access to player and puck tracking data that has never been publicly available. The jerseys have a tracker in a slot behind their right shoulder, I’ve noticed it under the white jersey. Each puck also has a chip embedded to track location, shot speed, etc.
Aside from introductory videos, I’m not sure the site is working yet.
NHL EDGE Puck and Player Tracking Statistics, including skating speed, skating distance, shot speed, shot and save location, and zone time for National Hockey League players and teams.
edge.nhl.com