A normal eInk screen like in an eReader? I doubt it.
There is no official and easy to find documentation about them, you have to pay big money, the screen are quite pricey, and I’m not aware of an eInk screen with the screen ratio of the DevTerm.
They are not driven like a normal LCD pannel, and need a dedicated controller (and socftware) It is not that easy as just swapping the screen.
Now there are some SPI screen that do exist and are publicly documented (or at least par of) but they have at least one big issue. They are really slow, and even worse the one with colour. It can take up to 10-20s for full refresh on the coloured one. Also I’m not aware of any SPI one that would fit the DevTerm screen ratio.
And for both, the panel are not cheap. Back in the day a 6" panel for an eReader was costing something like $40 to $60, and I genuinely doubt the price went down (unless you are called Amazon)
So yeah. In theory it is possible, in practice I doubt it will happen