Ahh, allow me to explain.
Those cute dotted lines demarcating sections? Those are dotted lines demarcating sections. Those demarcated sections? Those demarcated sections each covers a different term.
Biden's term as president did not begin in 2020 when inflation started going through the roof. He wasn't even elected yet.
Biden's term ended in January of 2025.
The current rate of inflation went back up to 3%. Under Trump.
Hope this clarifies things,,,