The tech leaker Stephen Troughton-Smith has supported a rumor that an iPad will gain the ability to pair properly with a mouse with the next iOS update. This new feature will allegedly be a new accessibility option in the new upgrade. However, it is not clear if the rumor applies to wireless, wired or both in terms of these peripherals yet.
https://www.notebookcheck.net/iPads-may-finally-gain-mouse-support-with-iOS-13.418961.0.html