There's no way to connect WB Serial like in EFI Live. There are some ways to get AD channels in some ECM/PCM using EGR if not used.

Wide Band won't help much Closed Loop, O2 sensor is going to adjust to Stoich. BLM or the Long Term Fuel Trim is data to use in Closed Loop. It goes Open Loop in PE so those numbers won't help and it's back to Wide Band.