I called this API
This endpoint https://sandbox.api.visa.com/vpa/v1/requisitionService allows you to request one or more virtual accounts. The VPA system then sends the account number of the account picked from the proxy pool for the Add action in the response. Since this endpoint is for testing purposes in the sandbox environment, the data in the sandbox is limited and might not be current. Please use the sandbox to get a general view and guide of the endpoint request and response structure. When you are ready to promote your project to the higher environment, you'll be able to test with live data.
When you call the Request Virtual Account API endpoint, the account information is sent through an immediate response. The account is not posted on your Visa Developer Dashboard.
Here's the link to the API reference page.
Using our Code Explorer on the API reference page, you can also try out the API in sandbox using the sample payload and see a response.
Can you share more details about your "visa dashboard"?
When you invoke the API, you will get a response with the account number. It is up to you how you want to handle the returned data.
Can you please share below details to help us understand what you are working on?