Can ForeFlight connect to the SiriusXM SXAR1 and Stratus at the same time?

Yes, the SXAR1 and Stratus can be used with ForeFlight at the same time. The SXAR1 will provide the weather overlays while the Stratus will provide ADS-B traffic and GPS information.  TAFs and METARs will come from both sources and the newest TAF or METAR will displayed, regardless of source.