  We consider a topological Floquet insulator realized as a honeycomb array of
helical waveguides imprinted in weakly birefringent medium. The system accounts
for four-wave mixing occurring at a series of resonances arising due to Floquet
phase matching. Under these resonant conditions, the system sustains stable
linearly polarized and metastable elliptically polarized two-component edge
solitons. Coupled nonlinear equations describing evolution of the envelopes of
such solitons are derived.
