My head canon is that it was simple reverse psychology. Biden really wanted to keep Cuba on the list, but also wanted to score some easy political points on the way out, so he made a show of how he was de-listing them, knowing Trump would undo it a week later because Trump is an immature crybaby bitch.

Damn. Biden should have cancelled more EV and clean energy projects and funneled money to the oil companies in his last week.