Taking over the helm of a country is enough of a challenge.
None of that was there for this speech.
A reason to make meaningful eye contact is to boost trustworthiness, empathy, credibility and likability.

Biden accomplished none of that tonight.
No smiles or twinkle in his eyes tonight."
“The endless throat clearing was distracting and borderline bizarre.

The body language expert concluded that this was definitely not Biden’s best performance.
The throat clearing is all that will be remembered.