tl;dr -> HashiCorp's various tools exist as snaps but none are published by HashiCorp. All are out of date. Some have incorrect metadata. Few provide any clue as to who or where the upstream is. There's usually not even a way to contact the snap author to submit patches or ask for an upstream link. eg https://snapcraft.io/nomad
Yep, it's a massive smell. When I looked at installing a snap I wanted to audit the build script but I couldn't find that anywhere. That's a big NO from me.
tl;dr -> HashiCorp's various tools exist as snaps but none are published by HashiCorp. All are out of date. Some have incorrect metadata. Few provide any clue as to who or where the upstream is. There's usually not even a way to contact the snap author to submit patches or ask for an upstream link. eg https://snapcraft.io/nomad