In Australia.
In America the effect really depends on the subgroup you're looking for. Educated vs uneducated, wealthy vs poor, rural vs urban. Overall Millennials haven't gotten more conservative as they age, but aren't continuing to move left. The entire cohort has always been many points left of the others, absolutely from the constant crises. I'm not sure of any recent research on the cohort moving further in recent times, but I'd love to see it if anyone has it.
The other worry here is, Millennials might also be the last generation to do this, as we're losing in many thought spheres where young people get their information, including first political impressions of the world around them. Conservative think tanks absolutely saw what was happening with Millennials and vowed to win back the next generation.