Draw to Raw Framebuffer (1bpp)?

I am currently repurposing an old Native Instruments Maschine MK1 controller, of which the displays can be controlled via USB with https://github.com/quasart/cabl/tree/mk1_midi

I would really love to use LVGL to write to the 2 displays on the device. How can I skip the display drivers and get a raw pixel buffer?

This is how the current test code writes to the displays: