New? CubeCell and ASR650x are discussed on the forum for 9+ months already. 
For more information see: Heltec CubeCell - part 2
CubeCell (in topic title) indeed is not ESP32 based.
Not really (see above link). Heltec’s CubeCell product range uses the ASR Microelectronics ASR6501 and ASR6502 SiP’s (Cypress ARM Cortex M0 + SX1262) but the ASR’s have no Arduino support.
It is Heltec who has added the Arduino support for their CubeCell products. Development with the Arduino framework is supported for both the Arduino IDE as well as PlatformIO.
LoRaWAN support is based on Semtech’s LoRaMac-node (as this already provided SX1262 support).