The delayed ninth episode of the January 6th panel was basically a recap of the incidents of January 6th, the culpability for said criminal incidents, and, based on that copious and sometimes chilling material, the unanimous decision by the panel to subpoena the former President for documentation and personal testifying concerning that day.
Given the number of times various panel suggested he may have engaged in illegal acts, I doubt the former President will agree to appear; he’d rather face a potential contempt of Congress charge, and since that must be approved by Congress, he’ll no doubt hope he can delay it until after the next Congress is sworn in – and the House is controlled by his minions.
So now we wait to see how Trump responds.