      supports_functions_in_partial_indexes = True
      # Does the backend support covering indexes (CREATE INDEX ... INCLUDE ...)?
      supports_covering_indexes = False
      # Does the backend support indexes on expressions?
      supports_expression_indexes = False
      # Does the backend treat COLLATE as an indexed expression?
      collate_as_index_expression = False
  
      # Does the database allow more than one constraint or index on the same
      # field(s)?
 
</s> remove     supports_expression_indexes = True
 </s> add  </s> remove     supports_expression_indexes = True
 </s> add  </s> remove     supports_expression_indexes = True
 </s> add 
    supports_expression_indexes = True
      supports_functions_in_partial_indexes = True
      # Does the backend support covering indexes (CREATE INDEX ... INCLUDE ...)?
      supports_covering_indexes = False
      # Does the backend support indexes on expressions?
    supports_expression_indexes = True
      # Does the backend treat COLLATE as an indexed expression?
      collate_as_index_expression = False
  
      # Does the database allow more than one constraint or index on the same
      # field(s)?
keep keep keep keep replace keep keep keep keep keep
 Refs #26167 -- Changed default value of DatabaseFeatures.supports_expression_indexes to True. 
django/db/backends/base/features.py