Our company has a Discord, but we employ a professional Community Manager for it. When community members bring issues up:
1. they're encouraged to do so in public, so that other community members can help if possible, and/or so bots can reply with suggested FAQ answers;
2. the Community Manager will answer with the company line for questions the company has set answers to (e.g. "when are you releasing X?" or "why is [abusive DoS-like pattern of requests to your service] not working?");
3. otherwise, if the Community Manager knows the answer for sure off the top of their head, they'll give the answer;
4. and if not, the Community Manager relays the question to an engineer in our Slack, where we either have an answer off the top of our heads, or we file it as an issue.
Seems to work just fine for us so far.
Some of the engineers are also sometimes in the Discord (and we're all registered to it), but other than the Community Manager, it's not our job to be in there.