Speedfusion VPN key exchange

I am conducting some assurance work on my Company’s fleet of Peplink routers and I need to broadly document how the Speedfusion TLS VPN is set up. I have documentation from around 2 years ago that states phase 1 key exchange is via DH group 14. I was wondering if that was still the case, or if it had moved to Group 19+. If anyone knows how to get hold of any newer documentation (if available), it would be appreciated.