Shelly LoRa add-on support?

Shelly has recently introduced LoRa add-on modules for their Gen3 and Gen4 devices.

Does someone have an idea if OpenMQTTGateway supports / will support those (with LILYGO TTGO LoRa32 868 MHz board) โ€“ and if, how?

Its already supported. The LILYGO TTGO LoRa32 firmware files you can find ready to install on github.

You need most likely those 3 files for installation on that device:
ttgo-lora32-v21-bootloader.bin
ttgo-lora32-v21-firmware.bin
ttgo-lora32-v21-partitions.bin

If I understood correctly, the above mentioned OpenMQTTGateway firmware supports LoRa devices.

However, does someone already have experience how, in practice, the integration of a Shelly LoRa add-on is done, how to get f.ex. sensor readings and how to control Shelly device using LoRa?

Not sure of the availability of this addon, did you find it available to purchase somewhere ?