The Oyster supports the LoRaWAN 1.0.2, 1.0.3, and 1.1 specifications.
Please note however that at this time (Mar 2019), most network servers do not have complete or correct 1.1 support, and there is no official LoRaWAN 1.1 certification process, so the 1.1 protocol is essentially still experimental across the industry.