I’m an Alexa user rather than Google Assistant, so probably not the best person to ask.
Sinric is one option, although I’ve never tried it.
I use Node-Red to facilitate the integration between Alexa and Blynk, and I know that there are Google Assistant plug-ins for Node-Red too - but as I said I’ve never tried them.
This topic covers my Alexa/Node-Red/Blynk integration…