MAN produces around 100,000 trucks per year. They plan to produce about 1,000 electric trucks in the second half of this year, which suggests that going forward, about 1 in 50 new MAN trucks will be electric.
It'll probably ramp up over time. Even US EV adoption is continuing. With ~4M EVs (not including hybrids) on the road in 2024 compared to ~2M in 2022. This is still only like 1.4% of US cars but hey gotta start somewhere.