fix: Handle Python date format for GENERIC_CHART_AXES feature (#25135)

superset/connectors/sqla/models.py

@@ -991,11 +991,13 @@ class SqlaTable(
         time_grain = col.get("timeGrain")
         has_timegrain = col.get("columnType") == "BASE_AXIS" and time_grain
         is_dttm = False
+        pdf = None
         if col_in_metadata := self.get_column(expression):
             sqla_column = col_in_metadata.get_sqla_col(
                 template_processor=template_processor
             )
             is_dttm = col_in_metadata.is_temporal
+            pdf = col_in_metadata.python_date_format
         else:
             sqla_column = literal_column(expression)
             if has_timegrain or force_type_check:
@@ -1012,7 +1014,7 @@ class SqlaTable(
         if is_dttm and has_timegrain:
             sqla_column = self.db_engine_spec.get_timestamp_expr(
                 col=sqla_column,
-                pdf=None,
+                pdf=pdf,
                 time_grain=time_grain,
             )
         return self.make_sqla_column_compatible(sqla_column, label)