Currently we need to manually refresh a dataflow or set it for a scheduled refresh.
However, it would be great if we can do so via a Rest API. By that we can programatically make an HTTP post request to invoke the API for the dataflow refresh
The similar functionality is available for Power BI dataflows : https://docs.microsoft.com/en-us/rest/api/power-bi/dataflows/refreshdataflow
It would be great to have the same feature for Power Apps dataflows as well.