I’ve been using iPads to write and edit text documents for years. All without the aid (crutch?) of using a mouse or trackpad!
Let’s be honest about the Surface Pro Products.
Microsoft Surface devices are, basically, smaller form factor mobile Windows laptops.
On the Surface/SurfacePro devices, Windows looks to be pretty unweidly to use and navigate by touch alone and so do all of the regular apps for Windows.
Windows and all of the available applications that run on Surface devices are NOT optimised, AT ALL, for touch.
That is the REAL reason Microsoft allows 5 different input devices (keyboard, which looks a LOT like an Apple keyboard , BTW, mouse, trackpad, pen AND Surface Dial) because all the UI elements in both Windows and Windows applications are too small to navigate with your fingers!
Microsoft and Windows forces you to use another input device, mostly, instead of your fingers!
Kinda defeats the idea of having a “touch” screen interface if you STILL need the use of a, seemingly, integral pen, mouse or trackpad.
IPads and iOS are designed from the ground up, to be, primarily, touch ONLY devices.
Microsoft Surface products are not true touch screen computing devices.
They are a regular full blown laptop computers with touch screen capabilities added to them.
Whole different animal!
Other than stylus support, I would not hold my breath or hold out hope for Apple to add native wireless mouse or trackpad support to iPad any time soon.
It took Apple nearly 20 years to offer multi-button mice with Apple Macs.
We are only year 8 into iPads.
So, you will have, at least, another 12 year wait for this to, possibly, happen and by that time, new computing input device technologies will surely be with us, by then, with mice and trackpads, possibly, being obsoleted by that time.