Fridge not cooling, freezer is really cold

Hello, we have a GE french door fridge (GFE26JSMAFSS) and the fridge has not been cooling (~60F top shelf, 48F bottom shelf), while the freezer is really cold (-15F). We have cleaned the condenser coil, confirmed the condenser fan and compressor are working. The evaporator fan seems to be working just fine as well.

At first we thought it’s either the defroster thermostat or heater. So we opened up the cover and did NOT find the evaporator coils to be covered in frost/ice buildup. We did replace the defroster thermostat anyway and confirmed that the heater is still in working condition.

This did not fix the issue so we checked the damper and thought that it was broken not able to open. We just replaced the damper assembly a few days ago, we could feel a bit of air coming out the top vent, but so far it seems like the issue isn’t fixed yet. Our last thought is that the temperature sensor is faulty. We ordered a sensor replacement too, but just now I found out that the fridge has 4 sensors? Would replacing the one in the fresh food section be my best bet?

Any insight is appreciated!