If it takes 2-3 years, then that means that the economic growth we experienced in ~2021 is Trump’s 2017/19 policies, and the economic downturn we’re receiving in 2024 is due to Biden’s 2021/23 policies.
I highly doubt any but the most crude policy changes would demonstrate within 5 years how they were to play out in the longer term. The idea of that seems almost as insane as US politics.
Also, Dems do literally the exact same things.