Bad 02 sensors?

So I had service engine light come on a little after I put catless downpipes on and about a week after I had misfire in cylinders 4-6 (bank 2) and saw that there was an 02 sensor code and I know it isn’t because of the cat delete because I cleared the codes and it came back. The code is for the pre cat 02 sensor. Would this cause the misfires? I did my first log and I heard that if the AFRs fluctuate it can mean bad 02 sensor. My burbles also sound weird idk how to explain but they are not uniform and are random also quieter. But since the misfire I have not beat on the car at all.