a display driver that connects to that flat ribbon cable to the display.
a MCU or computer to host your programming and send commands to the display driver
power, wether it’s battery, USB, or induction…
You can separate the screen from the driver and have the e paper show the last image. The one thing I’d be worried about is how fragile the components are on the side of the rapper display itself as well as the ribbon cable.
Also, you mention 150+ cards. Think of the time it would take to change each one separately with a dock. Connecting the display to the driver is not hot pluggable you would likely need to power cycle the whole thing at every card. Plus the damage risk of constantly connecting the fragile connectors.