I'm honestly shocked that Biden's approval is that low. Isn't it like +16 nationally? Most likely, some of the national polling which shows Biden +20 or more is fantasy land stuff just like the +10-16 Biden ones before the election. Even though it's PPP, I don't think this poll is that far off from reality.
Generic opponent polls usually overestimate the generic option against incumbents. I would still say this is lean R just because I'm just going to adjust every rating I have 1 to the right of where my instincts would set it.
That's normally true, and much moreso the case in heavily red/blue states with lacking name recognition, but in this case it lines up with his approval/disapproval which it seems not a lot of people are undecided considering it's this far out.