I have never looked into this, so it doesn’t surprise me if it doesn’t work. If you would like and have the time to investigate what would be needed, that would be great!
Note that this would require support from: https://github.com/lib/pq (which is the driver used by LoRa (App) Server to connect to PostgreSQL databases). So that could be a starting point to find out (or investigate if they are planning to add support for this)