This is the pattern of one pollster that seemingly polls only Arizona. Trump never had an unambiguous advantage in approval since early 2019. He had some hideous approval and disapproval numbers in the late spring and early summer of 2020 and managed to get those nearly even at election time. That is what campaigning is about, and he barely lost Arizona. After the election his approval numbers. The crossing over reflects Joe Biden becoming President. So far the gap favors him strongly.
The red line is disapproval for the President at the time, and the blue line is approval.
This applies to the President even as early as January 2019, just before the first impeachment.
The ideal subject of totalitarian rule is not the convinced Nazi or the dedicated Communist but instead the people for whom the distinction between fact and fiction, true and false, no longer exists -- Hannah Arendt.