By default the date range in a Looker studio report applies to:

In Looker Studio, the default behavior for the date range control is to apply to all fields within the entire report. This means that if you set a date range, every chart, table, and scorecard in the report that uses date-based data will update to reflect that chosen period. This design simplifies report viewing and ensures consistency across all visualizations. The option "All data sources for the report" is incorrect because while the date range affects data from various sources, it specifically applies to the fields within those sources that are used in the report, not the data sources themselves as a whole. "Only to a single field" is incorrect because the date range control is designed for broad application, not granular field-level control. "There’s no such feature in Looker studio" is incorrect as date range controls are a fundamental and widely used feature for data exploration and reporting.