I have a B-L475E-IOT01A2 Discovery kit (868 MHz). Is this board able to communicate with other LoRa modules of the same frequency?

[NMAND.1]

Say, for example, can B-L475E-IOT01A2 Discovery kit (868 MHz) communicate (send and receive data) with multiple Grove - LoRa Radio 868MHz (https://www.seeedstudio.com/Grove-LoRa-Radio-868MHz.html).

[Tesla DeLorean]

Sure, you'd need one serial port for each, or rework the firmware to provide some muxing scheme

There are also ST based modules

https://www.seeedstudio.com/LoRa-E5-Wireless-Module-p-4745.html

https://www.seeedstudio.com/Grove-LoRa-E5-STM32WLE5JC-p-4867.html

https://www.seeedstudio.com/LoRa-E5-mini-STM32WLE5JC-p-4869.html

There are shields with SX130x parts that have multiple Rx channels