The fireplace in our 2016 Flagstaff is starting to make a squeaking noise about once every 2-3 seconds. The noise is still there if the fan and heater is off, and seems to be related to the fake fire....
I'm betting either the small motor that turns the "fire" is dying, or a bushing is squeaking.
Either way, you get to take it apart and either disable the motor, lube a bushing, etc. Honestly, I've thought about disabling my motor, as it's a bit loud.