Induction heating requires ferric metals to be effective. Standard stainless steel and aluminum kettles that brewers use are not generally magnetic enough to conduct heat from an induction system.
You'd be looking for a new kettle with a sandwiched layer of iron or soft steel.
Your kettle should be of a type with a magnetic and flat floor. Otherwise it will not heat up.
Avoid any "self/smart thinking" heating system. They think different from you ??? We have one in the kitchen (ceramic plates, not induction) and overrules you while going for a strong boil of the wort.