In case you missed it: https://www.st.com/en/microcontrollers-microprocessors/stm32wlex.html
It’s a true SoC, as in everything is on one die. This makes it different than the Atmel LoRa parts, as far as I know. ST has also done a few nice things that Semtech hasn’t – notably documenting some features that Semtech was reticent to document (Semtech and ST have slightly different marketing objectives).
Naturally, it gets announced two weeks after I submit a STM32L4+SX127x design for prototype.