Hi,
you need to invert the Sbus signal in order to use it with a normal UART.
The Apogee autopilot board already has such an inverted built in, for Lisa you need to add one externally.
Regarding simulation: only radio_control ppm is currently implemented there.
Use sbus only for the ap target and ppm for the nps target:
<target name="ap" board="lisa_m_2.0">
<subsystem name="radio_control" type="sbus">
<configure name="SBUS_PORT" value="UART1"/>
</subsystem>
</target>
<target name="nps" board="pc">
<subsystem name="fdm" type="jsbsim"/>
<subsystem name="radio_control" type="ppm"/>
</target>
Cheers,
Felix