It is common among Cabinets to have their people resign from the positions to throw Presidential force under the bus. Likewise, both history and the present refer to quite a few events where the cabinet-level secretaries decided to resign from the presidential administration. The chart below clearly compares the turnover rate during the reining period of Presidents such as Ronal Reagan, George H.W. Bush, Bill Clinton, George W. Bush, Barack Obama, and Trump.
Joe Biden winning the Presidential Elections was perhaps the most pleasant news among the citizens of America. Following in the footsteps of previous resignation trends, this time too, Chad Wolf, an Acting Director of Homeland Security announced his resignation from the Presidential administration of Trump when he was still days away from the end of his Presidency. Similarly, the Trump administration saw the most numbers of cabinet secretaries' resignations when compared to those of other Presidents.

Infographic by: Statista.com