To be fair, I'd expect the questions to Trump to be much harder. He was POTUS, this year, during a pandemic outbreak. A lot of questions are going to be at his response to the outbreak, which will require him defending his response.

You can only ask Biden about what he would do, which are going to end up softball because he can say whatever ideal solution he wants (or he can also provide nuanced answers).

During other elections we've always had some boogeyman or strawman to point to. "What are you going to do about Iran?" "What are you going to do about healthcare?" "What's are you going to do to prevent attacks?"

This year is very different because we are in the midst of a crisis.