Here are some AMD tools, docs are thin on the ground. [0]
I have a boatload of Intel vPro machines spread throughout multiple countries (or the basement) and connect to them both via internet (mutual TLS authentication) and VPN. Never had any reliability issues at provisioning or operating. I had an old AMT v2.1 machine that was a bit unreliable, needed to be manually powered on once in a while or the remote connection wouldn't work.
I wholeheartedly recommend Meshcommander [1] for this.
[0] https://developer.amd.com/tools-for-dmtf-dash/
[1] https://www.meshcommander.com/meshcommander