The XM signal has nothing to do with the new TFT - someone posted in another thread that XM signal works very well in the new R18 which has the same TFT as the RT. The antenna component or its positioning is to blame. There are also older threads in the forum related to previous RT models and complaining of XM signal issues - so issue was not introduced with the new model (nor fixed)Ironic how BMW listened to riders who hated the radio antenna sticking out and hid it under the fairing. Of course, this is why XM reception no longer works.
I have a good friend who was all amped up to get a new RT with the TFT. Until he found out how BMW implemented the infotainment system. What does he have now? A 2020 Goldwing Tour DCT. He was a long time BMW owner. BMW's new TFT/Infotainment is so bad they are losing customers.