Is there any LoRa PHY layer example with a Meshtastic frame embedded?

Development Hardware
1

I tried to reconstruct the physical appearance of a Lora msg used by Meshtastic, and I failed. Anybody willing to help me?
Thanks

I expect something like this:
2B preamble - 1B sync word - xB meshtastic header? - 1B CRC?

2

Most all LoRa libraries will allow you to build a packet of bytes that the LoRa device sends.

The preamble, sync word and CRC are defined with library functions, they are not part of the LoRa data payload itself.