Vampires and Lycans can interact with humans and most likely will, whether the humans know they are supernatural or not is subjective, excorists are likely to know, refugees not necessarily though they may just be paranoid of any newcomers depending on the group of refugees. However humans may also voluntarily choose to interact with vampires and lycans as they are slightly less likely to be killed by them as say zombies.
The humans running around the city do know the supernatural stuff exists as that is what they are running from, however they don't have an encyclopedia of supernatural creatures to consult from so they aren't aware of every last supernatural entity in the city. However the Lycans and Vampires are two of the larger forces in the city and thus are more likely to be known.
And i have seen lore on partial transformations with lycans so jsut showing fangs works perfectly fine
In hope that helped