Don't be impatient. It takes a long, long time in most of the Papis.
But first to the genes: it is really a genes business. They are inherited. So you can not expect fringes, if mom does not have them, nor dad, nor grand parents ....
You got to look at the parents if you want those fringes, and then, with a little bit of luck, you will see some on your Papillon later.
Fringes are also a surprise at occasions, and unexpected in their length or or hair density.