Loss of power while driving uphill?

A friend's car. He says he notices loss of power going uphill. He tried everything he knows. He even removed the hybrid battery and tested. He is good at that i know. He sent it to me. No engine codes. Engine sounds normal. Full in coolant and oil. No transmission codes, no hybrid codes. I drove it and it drove fine. I tried uphill and it's not that bad but weaker than it should. Feels like it's trying but the response is not where it should be. I am familiar with cars and shudder and transmissions, and that is not it. I feel like the catalytic may be the issue here. I took a lot of live data and few data to help you help me as much as possible. The first o2 sensor on these is right on top. I have the gauge that connects to the o2 sensor hole and i can measure. Should i measure this first one and then the one after the cat you think? Let me know if any of these numbers make sense.