let code = `\
async function f() {
  const value = await Promise.resolve(1);
  console.log(value);
}
`.trimEnd();

const out = babel.transformSync(code, {
  configFile: false,
  plugins: [
    require("@babel/plugin-transform-regenerator"),
    require("@babel/plugin-transform-runtime"),
  ],
});

console.log(out.code);

import _awaitAsyncGenerator from "@babel/runtime/helpers/awaitAsyncGenerator";
function _regeneratorAsync(n, e, r, t, o) { var a = _regeneratorAsyncGen(n, e, r, t, o); return a.next().then(function (n) { return n.done ? n.value : a.next(); }); }
function _regeneratorAsyncGen(r, e, t, o, n) { return new _regeneratorAsyncIterator(_regenerator().w(r, e, t, o), n || Promise); }
function _regeneratorAsyncIterator(t, e) { function n(r, o, i, f) { try { var c = t[r](o), u = c.value; return u instanceof _OverloadYield ? e.resolve(u.v).then(function (t) { n("next", t, i, f); }, function (t) { n("throw", t, i, f); }) : e.resolve(u).then(function (t) { c.value = t, i(c); }, function (t) { return n("throw", t, i, f); }); } catch (t) { f(t); } } var r; this.next || (_regeneratorDefine(_regeneratorAsyncIterator.prototype), _regeneratorDefine(_regeneratorAsyncIterator.prototype, "function" == typeof Symbol && Symbol.asyncIterator || "@asyncIterator", function () { return this; })), _regeneratorDefine(this, "_invoke", function (t, o, i) { function f() { return new e(function (e, r) { n(t, i, e, r); }); } return r = r ? r.then(f, f) : f(); }, !0); }
function _OverloadYield(e, d) { this.v = e, this.k = d; }
function _regenerator() { /*! regenerator-runtime -- Copyright (c) 2014-present, Facebook, Inc. -- license (MIT): https://github.com/babel/babel/blob/main/packages/babel-helpers/LICENSE */ var e, t, r = "function" == typeof Symbol ? Symbol : {}, n = r.iterator || "@@iterator", o = r.toStringTag || "@@toStringTag"; function i(r, n, o, i) { var c = n && n.prototype instanceof Generator ? n : Generator, u = Object.create(c.prototype); return _regeneratorDefine(u, "_invoke", function (r, n, o) { var i, c, u, f = 0, p = o || [], y = !1, G = { p: 0, n: 0, v: e, a: d, f: d.bind(e, 4), d: function (t, r) { return i = t, c = 0, u = e, G.n = r, a; } }; function d(r, n) { for (c = r, u = n, t = 0; !y && f && !o && t < p.length; t++) { var o, i = p[t], d = G.p, l = i[2]; r > 3 ? (o = l === n) && (u = i[(c = i[4]) ? 5 : (c = 3, 3)], i[4] = i[5] = e) : i[0] <= d && ((o = r < 2 && d < i[1]) ? (c = 0, G.v = n, G.n = i[1]) : d < l && (o = r < 3 || i[0] > n || n > l) && (i[4] = r, i[5] = n, G.n = l, c = 0)); } if (o || r > 1) return a; throw y = !0, n; } return function (o, p, l) { if (f > 1) throw TypeError("Generator is already running"); for (y && 1 === p && d(p, l), c = p, u = l; (t = c < 2 ? e : u) || !y;) { i || (c ? c < 3 ? (c > 1 && (G.n = -1), d(c, u)) : G.n = u : G.v = u); try { if (f = 2, i) { if (c || (o = "next"), t = i[o]) { if (!(t = t.call(i, u))) throw TypeError("iterator result is not an object"); if (!t.done) return t; u = t.value, c < 2 && (c = 0); } else 1 === c && (t = i.return) && t.call(i), c < 2 && (u = TypeError("The iterator does not provide a '" + o + "' method"), c = 1); i = e; } else if ((t = (y = G.n < 0) ? u : r.call(n, G)) !== a) break; } catch (t) { i = e, c = 1, u = t; } finally { f = 1; } } return { value: t, done: y }; }; }(r, o, i), !0), u; } var a = {}; function Generator() {} function GeneratorFunction() {} function GeneratorFunctionPrototype() {} t = Object.getPrototypeOf; var c = [][n] ? t(t([][n]())) : (_regeneratorDefine(t = {}, n, function () { return this; }), t), u = GeneratorFunctionPrototype.prototype = Generator.prototype = Object.create(c); function f(e) { return Object.setPrototypeOf ? Object.setPrototypeOf(e, GeneratorFunctionPrototype) : (e.__proto__ = GeneratorFunctionPrototype, _regeneratorDefine(e, o, "GeneratorFunction")), e.prototype = Object.create(u), e; } return GeneratorFunction.prototype = GeneratorFunctionPrototype, _regeneratorDefine(u, "constructor", GeneratorFunctionPrototype), _regeneratorDefine(GeneratorFunctionPrototype, "constructor", GeneratorFunction), GeneratorFunction.displayName = "GeneratorFunction", _regeneratorDefine(GeneratorFunctionPrototype, o, "GeneratorFunction"), _regeneratorDefine(u), _regeneratorDefine(u, o, "Generator"), _regeneratorDefine(u, n, function () { return this; }), _regeneratorDefine(u, "toString", function () { return "[object Generator]"; }), (_regenerator = function () { return { w: i, m: f }; })(); }
function _regeneratorDefine(e, r, n, t) { var i = Object.defineProperty; try { i({}, "", {}); } catch (e) { i = 0; } _regeneratorDefine = function (e, r, n, t) { function o(r, n) { _regeneratorDefine(e, r, function (e) { return this._invoke(r, n, e); }); } r ? i ? i(e, r, { value: n, enumerable: !t, configurable: !t, writable: !t }) : e[r] = n : (o("next", 0), o("throw", 1), o("return", 2)); }, _regeneratorDefine(e, r, n, t); }
function f() {
  var value;
  return _regeneratorAsync(function (_context) {
    while (1) switch (_context.n) {
      case 0:
        _context.n = 1;
        return _awaitAsyncGenerator(Promise.resolve(1));
      case 1:
        value = _context.v;
        console.log(value);
      case 2:
        return _context.a(2);
    }
  }, null, null, null, Promise);
}