Hello, Anyone created a node for Teensy 3.6 yet?
Teensy is a target board, not a peripheral. Are you talking about uploading to Teensy? If so, they should provide a package for Arduino IDE with an index JSON file available at a well-known URL like ESP8266 or Nucleo do. Unfortunately, I see no package prepared for Teensy. They work through an alternative Teensyduino IDE.
It is better to ask the Teensy maintainers to make a package. XOD is able to pick up such packages the same way as the official Arduino IDE.