Saxon

It seems the serialization spec https://www.w3.org/TR/xslt-xquery-serialization-31/#ADAPTIVE_INDENT says that the output method 'adaptive' does not take the 'indent' option into account:

The indent and suppress-indentation parameters are not directly applicable to the Adaptive output method

On the other hand it seems desirable to me to allow indentation of complex maps output with the 'adaptive' method and XQuery implementations like BaseX or Altova XMLSpy for instance do indent the result of

declare namespace output = "http://www.w3.org/2010/xslt-xquery-serialization";

declare option output:method 'adaptive';
declare option output:indent 'yes';

map { 'foo' : map { 'bar':1, 'baz':'string'}, 'test': true()}

and output something like

map {
  "foo": map {
    "bar": 1,
    "baz": "string"
  },
  "test": true()
}

Saxon 9.8 (tested with HE and EE) however doesn't indent and outputs

map{"foo":map{"bar":1,"baz":"string"},"test":true()}

I have looked through Saxon specific options in https://www.saxonica.com/html/documentation/extensions/output-extras/ but haven't found anything.

Is there any way to get Saxon to indent the result when using output method 'adaptive'?