Documentation for secure boot and hardware crypto engines

Hello group / support team,

I’m using a ublox WIFI module NORA W30, including the Realtek open CUP RTL8720D.

I saw in datasheets as well in the SDK (freeRTOS) that this CPU supports different cryptho engines
(Integrated hardware crypto engine supports AES256/192/128 and SHA256)
Also in the SDK documentation there is a feature given for secure boot using Ed25519 signature.

Unfortunately, there is no further information, documentation, links, … where I can find further details for it. Also no reference for a code sample or similar to see how this works, or how to configure it - or let say the way to use the secure boot feature with the ed25519 segnature.

Hope somebody can support and/or provide documentation for this-