A bit of marketing spin by the Canadian distributor. The Glock 48 isn't the first Glock to be civilian legal in Canada. The G17 etc all meet the barrel length requirement, and models with 10 rd mags have been factory standard since the days when the US flirted with limiting mag capacity. Likewise the G48 wasn't designed for Canada. It was designed for the concealed carry market in the US which wanted the slim grip that goes with a single stack mag.
ps. In Australia the minimum handgun barrel length for a target shooter is 120mm.