Typescript convert plain string to Map

I have this string (called stats):

active_total: 1087
cumulative: 1
trace_total: 10

which is not even in JSON format.

This is the solution that I am trying:

let keyValuePairs = stats
  .split(/\s*\n\s*/)                     //split with optional spaces around the comma
  .map(chunk => chunk.split(": "));      //split key=value
  
const map = new Map(keyValuePairs);

console.log(map.get("sessions_active_total"));
console.log(map.get("cumulative"));

But it is throwing compilation error at this line:

const map = new Map(keyValuePairs);

Error message:

error TS2769: No overload matches this call.
  Overload 1 of 3, '(iterable: Iterable<readonly [unknown, unknown]>): Map<unknown, unknown>', gave the following error.
    Argument of type 'string[][]' is not assignable to parameter of type 'Iterable<readonly [unknown, unknown]>'.
      The types returned by '[Symbol.iterator]().next(...)' are incompatible between these types.
        Type 'IteratorResult<string[], any>' is not assignable to type 'IteratorResult<readonly [unknown, unknown], any>'.
          Type 'IteratorYieldResult<string[]>' is not assignable to type 'IteratorResult<readonly [unknown, unknown], any>'.
            Type 'IteratorYieldResult<string[]>' is not assignable to type 'IteratorYieldResult<readonly [unknown, unknown]>'.
              Type 'string[]' is not assignable to type 'readonly [unknown, unknown]'.
                Target requires 2 element(s) but source may have fewer.
  Overload 2 of 3, '(entries?: readonly (readonly [unknown, unknown])[]): Map<unknown, unknown>', gave the following error.
    Argument of type 'string[][]' is not assignable to parameter of type 'readonly (readonly [unknown, unknown])[]'.
      Type 'string[]' is not assignable to type 'readonly [unknown, unknown]'.

58         const map = new Map(keyValuePairs);

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