I analyzed again with correct shot noise level (-133.7dBVrms/rtHz) and 12% loss from visibility. The readout loss includes 12% loss from visibility, 2% loss from homodyne (dark noise, quantum efficiency, AR), and 20% loss from pick off BS.
sqz_dB = 11.8; % produced SQZ (dB)
L_rt = 120e-6; % FC losses
L_inj = 0.32; % Injection losses
L_ro = 0.31; % Readout losses
A0 = 0.05; % Squeezer/filter cavity mode mismatch
C0 = 0.06; % Squeezer/local oscillator mode mismatch
ERR_L = 1e-12; % Lock accuracy (m)
ERR_csi = 30e-3; % Phase noise (rad)