code: def df_datetime_daily_idx_panel():
      """Create panel data of two time series using pd-multiindex mtype."""
      return _make_hierarchical(
          hierarchy_levels=(2,), min_timepoints=3, max_timepoints=3
      )
  
imports: import pandas
  import pytest
  from pandas.testing import assert_frame_equal
  from sktime.transformations.series.time_since import TimeSince
  from sktime.utils._testing.hierarchical import _make_hierarchical
label_desc: Use image node_id 6 for calling a global function with example usage: df_datetime_daily_idx_panel() and returns: _make_hierarchical