No official, verifiable launch of a “Hyperliquid fiat exchange functionality test” is confirmed at this time. References to fiat access relate to a third‑party on‑ramp rather than native fiat rails. Independent coverage indicates Hyperliquid’s core platform does not accept direct fiat deposits or withdrawals today; balances are funded with crypto or stablecoins, as reported by CryptoNews.com (https://cryptonews.com/reviews/hyperliquid-dex-review/).