I tested Yaesu Twin with FTDX10, and the result is negative, the two devices do not communicate.
To be sure that I didn't make a mistake in the settings, I ask those who managed to make the configuration to make the settings public, regardless of the Yaesu transceivers used.
In the simple version, I used RRC by calling a PC running Win4Yaesu (at the radio end) and a Full HD video camera. There is no latency, the audio is very good, and the PTT is ok. It's not very comfortable, but that's all we can do for now.
I apologize for my English, I hope to make myself understood.