b) provide low level power to the isolated circuit
Small ferrite core with 5 turns in primary (transformer) and 15 secondary driven by MPU pins with current limited to a few mA @ 100kHz easy switches 230VAC home LED lights by using AC mosfet switch protected by zener 12V and around 100k resistor on mosfets gate, but 1M resistor could be even better.
Galvanic insulation from mains high voltages.
No problem with aging processes in optocouplers.
So, yes it provides low level power to AC mosfets gates - short circuit current measured was 10mA at configuration with bigger ferrite core to have better AC mains insulation.
Anyway, for mass production probably not the best solution while we need small ferrite cores, but it works programmed by tiny small ATTiny85 MPU