Custom Action - Flow

** Available with minimum Tables package version 1.130.0-3.

Flow Configuration JSON (Don't use this as it contains comments. use below clean one)

JSON

{
  "icon": "utility:add_source", //Any utility icon from https://www.lightningdesignsystem.com/icons/
  "recordLevel": "single", //Options: single, multiple, single+multiple
  "showInToolBar": true, //display in toolbar actions or not(By default available in context menu)
  "refreshOnClose": false,
  "targetConfiguration":
  {
		"componentName":"AccountDemoFlow", //Flow Developer Name
		"title" : "Account Demo Flow", // Title on the Popup
		"bodyCss" : "background-color:red", //Custom CSS
		"componentParamsList":
		[
			{
				"name": "recordId",
				"type": "String",
				"value": "{!selectedRecordId}"
			},
			{
				"name": "objectApiName",
				"type": "String",
				"value": "{!objectApiName}"
			},
			{
				"name": "relatedFieldApiName",
				"type": "String",
				"value": "{!relatedFieldApiName}"
			},
			{
				"name": "relatedRecordId",
				"type": "String",
				"value": "{!relatedRecordId}"
			},
			{
				"name": "source",
				"type": "String",
				"value": "TablesCustomAction"
			}
		]
  },
  "targetType": "Flow"
}

Clean JSON:

JSON

{
  "icon": "utility:add_source",
  "recordLevel": "single",
  "showInToolBar": true,
  "targetConfiguration":
  {
		"componentName":"AccountDemoFlow",
		"title" : "Account Demo Flow",
		"componentParamsList":
		[
			{
				"name": "recordId",
				"type": "String",
				"value": "{!selectedRecordId}"
			},
			{
				"name": "recordIds",
				"type": "String",
				"value": "{!selectedRecordIds}"
			},
			{
				"name": "<anyAttribute>",
				"type": "<anyFlowSupportedType",
				"value": "<anyValue>"
			}
		]
  },
  "targetType": "Flow"
}

For flow variables which outputs list of inputs, make sure type of that variable is set to just data type & no prefix or suffix related to list, and also make sure input variable in flow is set to accept multiple inputs (collection). In above example, selectedRecordId outputs single string input & selectedRecordIds outputs list of string input.