With the new 'Rest API call' action, it is possible to connect and download data from a public or authorized API into a CSV/JSON file through a list of mapped parameters.
Even though, you have the possibility to see how the query has been structured in the 12.6 release, you cannot edit it.
It could be useful to interact directly and manually with the query sent by Board, similar to the SQL DataReader where you can switch to a manual query instead of the automatic proposal.