Dometic Ceiling Fan -Tastic 3300-3533, on 2018 320s, which fuse powers the fan? (Solved)

nüCamp has had Fuse Panel Labeling Issues in the 2016-2019 years (at least) but do check to see if your WFCO Power Center has a Fuse Assignment table.  In general TABs in that production period had the ceiling fan connected to Fuse #1.

The WFCO 'bad fuse indicator' should be on if the Fan Fuse is bad AND the Fan power switch is turned on to one of the three speed levels. But always check the fuse visually or ideally with an ohm meter.

Now, why do you believe the Fan is a model 3300-3533?
That model has an automatic opening lid . . .which is not the factory standard nüCamp installed.

For the typical 'manual' opening lid the 'lid open' switch can jam or fail.
With the lid open try to confirm the lid open switch is not jammed in the down position.

If both fuses are good and the lid open switch seems to be freely moving . . . next steps to troubleshoot will require accessing the fan internal wiring and usage of a voltage meter.