Here’s an observation in one of the actions in the Dataverse connectors in Power Automate, which is “Get a row by ID”.

Select Columns

If you have selected specific columns in the Select Columns parameter of the connector, only those will be shown in the Dynamic content in next steps of the Flow.

All Columns

When you have not mentioned/selected specific columns and kept it blank, you’ll see the complete list of fields in the next steps of the Flow.

List Rows action

The same is also true for other action like “List Records” which shows all the attributes when selected columns are not mentioned, but shows only the ones mentioned with other required attributes if you have specific column names entered as shown below.

Hope this was useful!

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12. FetchXML Aggregation in a Flow using CDS (Current Environment) connector | Power Automate
13. Parsing Outputs of a List Rows action using Parse JSON in a Flow | Common Data Service (CE) connector
14. Asynchronous HTTP Response from a Flow | Power Automate
15. Validate JSON Schema for HTTP Request trigger in a Flow and send Response | Power Automate
16. Converting JSON to XML and XML to JSON in a Flow | Power Automate

Thank you!