Ten years of iPads with NO native wired/wireless mice or trackpad/ball support.
I wouldn't hold my breath for this to happen any time soon.
iDevices and iOS from their inception have been designed, built/manufactured and coded to be TOUCH ONLY devices.
While stylii have been with iPads from the beginning, from third party stylus makers, it took Apple nearly five years to introduce a native stylus to the iPad, the Apple Pencil, and even this only works with only iPad Pro models and the new 2018, 6th gen 9.7 inch screen iPad and the Apple Pencil has been part of the Apple iDevice experience for almost three years.
Still no mice or trackpad support.
Apple AND developers would have to re-code iOS to have and make use of an on-screen pointed, like on a regular computer, for mice/trackpads to be useful.
Mice and trackpads are not the future for Apple and I don't think support for those input devices are ever coming to an iPad.
Microsoft Surface products need them because Microsoft just added touch support to their full versions of Windows and you need these input devices because the Windows UI on the smaller Surface devices make using your finger or common capacitive stylus a frustration to use as the Windows UI on-screen elements are very tiny and hard to navigate without multiple input devices.
Windows Surface devices can use 6 different input devices. iDevices use only three.
As a side note, if more users learned to just use the iPad’s bullt-in software, virtual keyboard, as of iOS 9, Apple programmed a nifty little trackpad-like feature that is STILL working today.
That stated you can move around the text "I" beam insertion point cursor by bringing up the iPad's software keyboard, do a two finger single tap to turn the entire keyboard area gray colored and into a gigantic trackpad area where you can easily control the position of the text insertion point "I" beam cursor.
You can highlight text and lines/body of text by doing a two finger double tap on the iOS software keyboard.
Then, do a single two finger tap on the keyboard area to fine tune the text selection.
That is as close to a mouse or regular trackpad that iOS is, currently, going to get.
Good Luck to You!
