To reproduce:

kag_lat = kwant.lattice.kagome(norbs=1)
kagome = kwant.Builder(kwant.TranslationalSymmetry(*kag_lat.prim_vecs))
kagome[kag_lat.shape((lambda pos: True), (0, 0))] = 0
kagome[kag_lat.neighbors(1)] = 1
kwant.qsymm.find_builder_symmetries(kwant.wraparound.wraparound(kagome))