E-ink keyboards are nothing new. We have covered a couple of interesting ones in the past that can be cusotmized for your favorite applications. The Nemeio is also works a look. It is a customizable keyboard that lets you manage your language, alphabet, layouts, and shortcuts.
The Nemeio has a wide e-paper screen with 81 transparent keys. It has navigation buttons, so you can switch keyboard profile and adjust brightness fast. With the companion software, you can create and manage layouts, bind commands to the keys, and create your own shortcuts. It has a USB-C connector and can be used with Bluetooth.