They usually release new technic sets in August. Last year’s Mercedes G Wagon was a masterpiece and released with preorder at that time. Stocks trickled into the stores around late August / September but if you preordered, you got it mailed to you weeks ahead of time.
To this day, my 8 year old daughter refers to it as a jeep. Coincidentally, I still haven’t put on those side steps forcing her to pole vault to get in it until she gets it right…