This page https://www.geeetech.com/3-in-1-out-hotend-kit-for-a10t-a20t-p-1126.html says the heater is 24V 20W. So x3 is 60W which at 24V is 2.5A, well within the rating of a single heater output on the Maestro. So a Duet Maestro with the extra 2-stepper daughter board would be able to drive it.