  We study the electronic conductance of dissipative Floquet Majorana zero
modes (FMZMs) in a periodically driven nanowire coupled to a quantum dot. We
use a numerical method which can accurately take into account the dissipation
effects from the superconducting bath, which causes the FMZMs to have a finite
lifetime. Our results show that, in the weak nanowire-dot coupling regime, the
peak conductance at zero temperature of the resonant dot can be well
approximated by a universal function of the FMZM lifetime rescaled with the
nanowire-dot coupling strength: For a long FMZM's lifetime, the conductance
approaches the characteristic quantized value of $G = e^2/2h$, whereas $G
\rightarrow e^2/h$ (uncoupled dot) as the FMZMs' lifetime goes to zero. In
principle, our method can be used to test the presence and lifetime of FMZMs in
such devices, which is key for any practical application of these topological
states.
