Familiarize yourself with the basics of Firmware configuration.
Currently, the OAE Configuration isn't yet added to the local config tool or the OATFWGUI tool.
Refer to this local config and upload the firmware through VScode and Pio until those tools have been updated. This config assumes the hardware from the BOM, so a 0.9° RA Stepper, 1.8° DEC stepper with 50:1 wormgear and 28BYJ-48 steppers for ALT and AZ, aswell as the OAE board with an ESP32 and TMC2209 drivers for RA/DEC and A4988 drivers for ALT/AZ.
Download the oae-fw branch from the Firmware Github.
The necessary steps can be found here.
Flash the firmware with the oaeboardv1 environment.