Currency symbols manually entered from Wikipedia's list of symbols and Google searching (could be inaccurate, please correct if possible). The list of currency is extracted from https://openexchangerates.org/api/currencies.json as of 15th August 2020.

currency_symbols.json

{
  "AED": "د.إ",
  "AFN": "؋",
  "ALL": "L",
  "AMD": "֏",
  "ANG": "ƒ",
  "AOA": "Kz",
  "ARS": "$",
  "AUD": "A$",
  "AWG": "ƒ",
  "AZN": "₼",
  "BAM": "KM",
  "BBD": "Bds$",
  "BDT": "৳",
  "BGN": "лв.",
  "BHD": ".د.ب",
  "BIF": "FBu",
  "BMD": "BD$r",
  "BND": "B$",
  "BOB": "Bs",
  "BRL": "R$",
  "BSD": "B$",
  "BTC": "₿",
  "BTN": "Nu.",
  "BWP": "P",
  "BYN": "Br",
  "BZD": "BZ$r",
  "CAD": "CA$",
  "CDF": "FC",
  "CHF": "CHF",
  "CLF": "UF",
  "CLP": "CLP$",
  "CNH": "¥",
  "CNY": "元",
  "COP": "COP$",
  "CRC": "₡",
  "CUC": "CUC$",
  "CUP": "₱",
  "CVE": "Esc",
  "CZK": "Kč",
  "DJF": "Fdj",
  "DKK": "kr.",
  "DOP": "RD$",
  "DZD": "دج",
  "EGP": "E£",
  "ERN": "Nfk",
  "ETB": "Br",
  "EUR": "€",
  "FJD": "FJ$",
  "FKP": "£",
  "GBP": "£",
  "GEL": "₾",
  "GGP": "£",
  "GHS": "GH₵",
  "GIP": "£",
  "GMD": "D",
  "GNF": "FG",
  "GTQ": "Q",
  "GYD": "G$",
  "HKD": "HK$",
  "HNL": "L",
  "HRK": "kn",
  "HTG": "G",
  "HUF": "Ft",
  "IDR": "Rp",
  "ILS": "₪",
  "IMP": "£",
  "INR": "₹",
  "IQD": "د.ع",
  "IRR": "﷼",
  "ISK": "kr",
  "JEP": "£",
  "JMD": "J$",
  "JOD": "JD",
  "JPY": "¥",
  "KES": "Ksh",
  "KGS": "лв",
  "KHR": "៛",
  "KMF": "CF",
  "KPW": "₩",
  "KRW": "₩",
  "KWD": "د.ك",
  "KYD": "CI$",
  "KZT": "₸",
  "LAK": "₭",
  "LBP": "LL",
  "LKR": "Rs",
  "LRD": "L$",
  "LSL": "M",
  "LYD": "ل.د",
  "MAD": "د.م.",
  "MDL": "L",
  "MGA": "Ar",
  "MKD": "ден",
  "MMK": "K",
  "MNT": "₮",
  "MOP": "MOP$",
  "MRO": "UM",
  "MRU": "UM",
  "MUR": "₨",
  "MVR": "Rf.",
  "MWK": "K",
  "MXN": "Mex$",
  "MYR": "RM",
  "MZN": "MT",
  "NAD": "N$",
  "NGN": "₦",
  "NIO": "C$",
  "NOK": "kr",
  "NPR": "रू",
  "NZD": "NZ$",
  "OMR": "ر.ع.",
  "PAB": "B/.",
  "PEN": "S/",
  "PGK": "K",
  "PHP": "₱",
  "PKR": "₨",
  "PLN": "zł",
  "PYG": "₲",
  "QAR": "ر.ق",
  "RON": "L",
  "RSD": "дин",
  "RUB": "₽",
  "RWF": "FRw",
  "SAR": "ر.س",
  "SBD": "SI$",
  "SCR": "SRe",
  "SDG": "£SD",
  "SEK": "kr",
  "SGD": "S$",
  "SHP": "£",
  "SLL": "Le",
  "SOS": "Sh.So.",
  "SRD": "SRD",
  "SSP": "£",
  "STD": "Db",
  "STN": "Db",
  "SVC": "$",
  "SYP": "LS",
  "SZL": "E",
  "THB": "฿",
  "TJS": "ЅM",
  "TMT": "T",
  "TND": "د.ت",
  "TOP": "T$",
  "TRY": "₺",
  "TTD": "TT$",
  "TWD": "NT$",
  "TZS": "Tsh",
  "UAH": "₴",
  "UGX": "USh",
  "USD": "$",
  "UYU": "$U",
  "UZS": "so'm",
  "VEF": "Bs.F.",
  "VES": "Bs.S.",
  "VND": "₫",
  "VUV": "VT",
  "WST": "WS$",
  "XAF": "FCFA",
  "XAG": "XAG",
  "XAU": "XAU",
  "XCD": "EC$",
  "XDR": "SDR",
  "XOF": "CFA",
  "XPD": "XPD",
  "XPF": "₣",
  "XPT": "XPT",
  "YER": "ر.ي",
  "ZAR": "R",
  "ZMW": "K",
  "ZWL": "Z$"
}