Paris may know Chloe is Queen Bee, but they don't know what kwamis are. Since they can't be caught on camera, nobody saw Pollen except for the people who were around Chloe.
I suppose they didn’t see Pollen, but she still made a suit appear out of thin air. That’s bound to raise a few eyebrows. Then again, Parisians are probably desensitized to weird stuff at this point.
Pollen is a legend. The chillest character on that show. I would imagine them being bold enough to reveal themself and transform in front of Hawkmoth. All while staring him straight in the eye.