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If you're looking for a plug-and-play device, there are options from Waveshare, Boox and Dasung.

If you're willing to DIY, there's a great open source project called PaperTTY that works with almost any e-ink panel. Despite the name being terminal-focused, it also (optionally) supports VNC.

I use an boox air c with bluetooth keyboard.

MIP might be a better tech to use?

I use a Boox Leaf with a Bluetooth keyboard and it works fine, for this sort of thing.