Problems deep frying on induction stove
While I can't say exactly what the issue is there are some possibilities:

Induction compatible doesn't mean ideal for induction. I've had pans which are compatible, as in they work, but they don't heat up well. Only ferrous metals will get heated by induction, many pans are a sandwich of metals with a ferrous base, how well the pans heat up depends in part how thick the base is, if it's too thin it won't be able to convert all the energy. You want something with a nice thick ferrous base, or even better cast iron
Your induction top may not be powerful enough. In the same way gas ranges are limited by the size of their burners induction is limited by the underlying electronics. A big pot full of oil is a lot of mass, the cooktop's electronics need to be able to create a large enough magnetic field to heat it