SUBGHZ_PHY middleware: why is it necessary to configure the UART? Is it possible to transmit a LoRa message without using the UART pins?

[Rvan .8]

I am trying to transmit a single int using LoRa and the SUBGHZ_PHY middleware. However, I am unsure as to why UART has to be configured under 'Platform Settings', and how I can setup the STM project for this purpose.

I am using STM32CubeIDE, and a Nucleo-WL55JC development board.

Any help would be appreciated.

Other info:

Protocol: LoRa

Frequency: EU 868MHz

[Tesla DeLorean]

Don't need but useful for diagnostic and debugging purposes.​

[Rvan .8]

Thanks!