How can cook toast on an induction cooker?

You cannot cook toast on an induction cooker because toast requires direct heat that an induction cooker does not provide. Induction cookers use electromagnetic fields to heat pots and pans made of ferrous metal, therefore toasting bread directly onto one will be ineffective and a potential safety hazard, as an open flame is required to make toast the best possible way. An air fryer would be one solution, or placing bread with toppings into a preheated and buttered cast iron skillet, which you can place on an induction burner.