Thanks for all of your help.Not sure about your fuel economy but if the sum of STFT and LTFT is under 10%, I would say you don't have a lean condition or injector problem.
Maybe try wiggling the o2 sensor harness and see a drop out on the signal? If not, connection is fine and that is one off the list.
If all checks out fine, you do not have an exhaust leak, I would just replace the sensor with an OE o2 sensor. There are times aftermarket parts are not reliable. Not much to say for a code like this.
I had a misunderstanding with fuel trims and looking for a reason for fuel economy drop along with this CEL in particular.
You’re right. The readings are normal.
I’ve been overthinking this.
But I would like to rule out air leaks and the wiring as you mentioned.
The trouble is, even if I wanted to try another sensor, the threads for this aftermarket converter got damaged before. I had forgotten. So, I think I’ll just live with it until another converter is needed rather than throwing several hundred at it to get the code to go away.