I have two Enviolo powered recumbent trikes. On both I tap the 48v battery into a voltage regulator that outputs 24 volts. That voltage is what feeds the electronic shifting devices attached to the Enviolo IGH.
Trike 1 - Nuvinci N380 with an electronic twist/grip shifter wired to the hub controller - Emotor is BBS02. Now this trike used to have a TSDZ2, and it worked fine with this same N380 IGH.
Trike 2 - Enviolo Cargo Hub with electronic Bluetooth control the Automatiq hub controller - Emotor is BBSHD .
There is no 'E shifting' in my system. The Enviolo systems themselves will attempt to keep the IGH turning at a cadence that you set via the hand controls. It works 'ok', but not magical.