The same engineers who staffed the IRC channel staff the Discord. Unfortunately it moved to a proprietary platform when Freenode was taken over in 2021. As _engineers_, though, they're never going to be a point of escalation for a support concern related to disputes, supportability, or issues involving personal information.
Sometimes the support experience matters a lot as well.
I think, for what it's worth, that the IRC channel was maintained by Stripe employees on their own accord, not a company sanctioned support channel, and the help there was very "best effort".