May I ask what part of the consensus around COVID jumping from animals to humans is dubious? Or rather, what peer reviewed studies dispute the zoonotic origin of Covid?

What was the verbage used for this report declaring the likelihood of an artificial origin for COVID 19? The phrase "____ degree of certainty/confidence" generally means they have zero proof to back up what they are saying, but that they think it's true. The I'll be honest, I'll trust the general consensus of the people who make a living studying disease more than a document from the House- which Congressional reps signed off on it? What are their qualifications to make definitive statements on the subject of virology? What evidence do they cite? (I really hate to add this, but tell me I'm wrong) what party are they a member of?