How long to steam daikon cake from grocery store

I bought this from Ranch 99. I don't know if it's cooked or not (anyone know?).

Last time, I sauteed on the stove and it turned out pretty good. This time, I'm thinking of steaming in my Instant Pot so it's less oily.

How long should I steam? With Instant Pot, I have to know beforehand; I can't check to see if it's done.