> Gen Zs political lean has not softened as they age into their late 20s, as it did with Millennials and older.

A quick search for generational boundaries put the consensus at around 1997, which would make the oldest 25 years old. I don't think there is any data to analyze about how their leanings will change. They've barely left college and during the most significant global crisis of most living people's lifetimes.