Hello,
as you already mentioned, there is no ready-to-use package for the ESP32 Display from 4D Systems. So far we have not worked with that hardware set.
We support out-of-the-box only the official ESP32 boards from Espressif. All other boards can be seen as custom specific boards and the complexity of the bring-up depends on the changes compared to the reference board. For more details please see chapter Custom Hardware Integration.
Best regards,
Manfred.