Question

how to create private integration details of notion with Workato.Creating HTTP connector in Workato using the notion of public integration

Answer 1

I know this may not be the answer you expect, but Notion can't extend what Workato offers.

You should ask them to include Notion's API to their options to then be able to integrate things.

Not even Zapier supports Workato, so the only way for this to happen is if Workato works with someone else to have integrations available.