I could get mine to work with any of the above suggestions.
Then I found this article instead.
https://www.raspberrypi.org/forums/viewtopic.php?t=316908
So using “dtoverlay=rpi-poe-plus” instead of “dtoverlay=rpi-poe” worked for me.
So I simply powered off my HASSIO, move my SSD to the computer, and at the end of the config.exe (Using Notepad++) added the 6 lines. The # is just a commenting line, but I kept it there.
# PoE+ FAN TEMPERATURE CONTROL
dtoverlay=rpi-poe-plus
dtparam=poe_fan_temp0=45000,dtparam=poe_fan_temp0_hyst=3000
dtparam=poe_fan_temp1=50000,dtparam=poe_fan_temp1_hyst=3000
dtparam=poe_fan_temp2=62000,dtparam=poe_fan_temp2_hyst=4000
dtparam=poe_fan_temp3=70000,dtparam=poe_fan_temp3_hyst=5000