At KB range we use sweeps from karate
At VG range we use sweeps from Jujutsu
At trapping range, in hubud, we use sweeps from silat
the primary 3:
Lead outside
from elbow ref lop sao
Lead inside
from double pak sao
rear inside
from pak lop
These foot sweeps can be done in karate and kempo as well as Wing Chun once you are at trapping range and the check and reference has been applied
on Grass Days there is always the opportunity to add a sweep in a sequence where appropriate, and once you know how to spot them you will start seeing them more often, and can apply them functionally in a real fight or competition when needed