Fire stick and use on IPAD PRO

iOS/iPadOS devices do not support connection of a FireStick - and neither do they support direct video input as a video monitor for other devices.

doubt you will get that to work using converters to change connectors is rarely enough

if it was me then I would go to the firestick site and check if ios / ipadOS was supported in any way, if not it would not work

if it was supported then some firestick app from app store would be required to communicate with the stick

another thing then not knowing much about firesticks then, my impression was that it's a stick one can install steaming apps on to watch on ones tv, would most of these steaming services not also have apps directly for the ipad wich would be on the internet like the firestick?