recipient_wallet VENMO giving 400 BAD REQUEST

[experimenter]

I am facing the same problem as here. response from paypal is

{
  "name": "VALIDATION_ERROR",
  "message": "Invalid request - see details",
  "debug_id": "e7f3e372ef137",
  "information_link": "https://developer.paypal.com/docs/api/payments.payouts-batch/#errors",
  "details": [
    {
      "field": "items[0].recipient_wallet",
      "location": "body",
      "issue": "Recipient wallet not supported in sandbox."
    }
  ],
  "links": []
}

Is venmo still not supported via sandbox?