I agree, the best way to utilise V2L is to use a separate charger like you have got. Prevents all the issues around grounding, neutral earth bonding and compliance issues. Plus it’s controllable and eliminates problems like potential overloading on the vehicles V2L output.
See my other post PowerHub Outdoor 3-Phase Off-Grid House System with EV V2L feature (UK)
In this setup we used a MPII as a dedicated charger fed through an isolation transformer. Of course this is much more expensive setup.
In your setup you could add in a low cost smart shunt configured as a AC Charger which will be displayed separately as another input source. Benefit of this is not just the visualisation, but the charge current is taking into consideration on the battery DVCC control when operating in ESS mode.