As far as I know there is no such thing in the current KiCad stable V5.1.x. There just is no way to convey such information from Eeschema to Pcbnew.
In KiCad-nightly V5.99 it is apparently possible to attach info such as track width and net classes to a net in Eeschema, and that info will be propagated to “Pcb Editor”. (Pcbnew has been renamed in V5.99) I have not experimented with this myself, and do not know which info can be forwarded from Eeschema to “Pcb Editor”.