I do not have the Poke 2 Color ... but I doubt you would want to use it as a remote access device for the following reasons:
1) The COLOR pixel-resolution of the Poke 2 Color is different than the Black-and-White pixel-resolution. Although the B/W pixel-resolution is an impressive 300DPI ... the color pixel-resolution is only 100 DPI!
https://onyxboox.com/boox_poke2color
This means that the device’s stated 1072×1448 pixel-resolution is only for B/W ... and the color resolution would be 1/3 of that: ~357x482, which is too low-res to be used as a remote desktop.
2) The Poke 2 Color screen size is 6”. Many years ago, I would use my 9.7” Kindle-DX (1200x824 pixel-resolution) as a secondary monitor for my Windows-8 1024x768 resolution desktop ... where I had a very hard time seeing text/menus from the Windows desktop, as the font size was too small on the Kindle DX. Finding the mouse/cursor on screen was often a time-consuming and eye-straining challenge.