There is an option: Import Newly Added Fields Automatically when creating/editing an AppFlow.
I want to create a new Flow using the Java SDK that sets this value to true.
The following code is part of a larger request that creates a new Flow. This section is used to map all available fields. However there is still an additional setting required to map new fields also.
List<Task> tasks = new ArrayList<>();
tasks.add(Task.builder()
.taskType(TaskType.MAP_ALL)
.sourceFields()
.connectorOperator(
ConnectorOperator.builder()
.salesforce(NO_OP)
.build()
)
.build());