Architect Data Action 504 timeout at 3s

Architect & Flows
1

Hit the hard 3s timeout on a POST to an external endpoint via Architect Data Action. The target is stable and responds in ~5s, so the Genesys side is killing it. Tried setting the timeout field in the action config to 10000 but it still fails with 504. Is there a way to bump the max timeout beyond 3s or is that a hard platform limit?

{
 "name": "SyncUser",
 "type": "http",
 "method": "POST",
 "url": "https://api.example.com/sync",
 "timeout": 10000,
 "headers": {
 "Authorization": "Bearer ${token}"
 }
}