I would be interested in hearing from anyone who has got a Bluetooth or BLE application working with the WL18xx as found on the Talon card. I have found that connect under bluetoothctl doesn’t work, and info works from the non-mangOH side but not the mangOH side. Particularly what firmware version are you using. Mine is SWI9X06Y_02.35.02.00 5208b3 jenkins 2020/06/10 00:30:12.
On the other side of the coin I have been able to get a nRF UART BLE peripheral application working on the mangOH Yellow and I’d be happy to give advice to anyone trying something similar.