No, except for the camaro most 3800's I've seen have a single 02 sensor 1, and single 02 sensor 2.
So it has only a single 02 sensor for fueling both banks and one after cat for monitors.

Most vortecs I've dealt with have 4 02 sensors.
Precat/fueling is bank 1 sensor 1 and bank 2 sensor 1
Postcat/monitor is bank 1 sensor 2 and bank 2 sensor 2

Low emission ulev, pzev etc would have like 3 sensors total for say a 4cyl.
Precat/fueling would be bank 1 sensor 1 then there will be another installed in cat towards the front and another that is post cat.
These would be bank 1 sensors 2 and 3, but not necessarily in order "I THINK".
I suspect sensor 2 might be always post cat monitor and sensor 3 is in the middle designated for whatever makes it a pzev.
Confused me everytime, had to look in book and verify etc every time they rolled into shop.
There is an order and it is not necessarily IN order I think.
I took a class long ago but forget it honestly, not a lot came thru our place.