Yellow fungus?

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I recently noticed my bearded dragon has an odd stain on her stomach, it’s a dull yellow and she’s had it for about two weeks now. I didn’t think anything of it as she’s pretty colorful, but when I tried to wipe it off in a soak it did not come off. I searched up what it was and found yellow fungus was a thing, She hasn’t shown any health complications and it doesn’t seem to bother her, I bought some anti- fungal protection stuff from the store and forgot to take a close up, but I have this picture from when she was glass surfing- note that’s not brown it’s just shaded from the lighting but there’s just that prominent spot there.

 

[Beansbanana]

It’s really hard to see in that picture.