diff --git a/packages/react/src/components/DataTable/stories/DataTable-ai-label.stories.js b/packages/react/src/components/DataTable/stories/DataTable-ai-label.stories.js
index 5852a96be3a2..e7bcf1148f32 100644
--- a/packages/react/src/components/DataTable/stories/DataTable-ai-label.stories.js
+++ b/packages/react/src/components/DataTable/stories/DataTable-ai-label.stories.js
@@ -386,7 +386,9 @@ export const AILabelWithExpansion = (args) => (
           <TableBody>
             {rows.map((row, i) => (
               <React.Fragment key={row.id}>
-                <TableExpandRow {...getRowProps({ row })}>
+                <TableExpandRow
+                  {...getRowProps({ row })}
+                  aria-expanded={row.isExpanded}>
                   {i === 3 || i === 4 || i === 1 ? (
                     <TableDecoratorRow decorator={aiLabel} />
                   ) : (
@@ -397,6 +399,7 @@ export const AILabelWithExpansion = (args) => (
                   ))}
                 </TableExpandRow>
                 <TableExpandedRow
+                  aria-hidden={!row.isExpanded}
                   colSpan={headers.length + 2}
                   className="demo-expanded-td"
                   {...getExpandedRowProps({ row })}>
@@ -456,7 +459,9 @@ export const ColumnAILabelWithSelectionAndExpansion = (args) => (
             {rows.map((row) => {
               return (
                 <React.Fragment key={row.id}>
-                  <TableExpandRow {...getRowProps({ row })}>
+                  <TableExpandRow
+                    {...getRowProps({ row })}
+                    aria-expanded={row.isExpanded}>
                     <TableSelectRow {...getSelectionProps({ row })} />
                     {row.cells.map((cell) => {
                       return (
@@ -467,6 +472,7 @@ export const ColumnAILabelWithSelectionAndExpansion = (args) => (
                     })}
                   </TableExpandRow>
                   <TableExpandedRow
+                    aria-hidden={!row.isExpanded}
                     colSpan={headers.length + 2}
                     className="demo-expanded-td"
                     {...getExpandedRowProps({ row })}>
diff --git a/packages/react/src/components/DataTable/stories/dynamic-content/DataTable-dynamic-content.stories.js b/packages/react/src/components/DataTable/stories/dynamic-content/DataTable-dynamic-content.stories.js
index b30c49104d36..7df6978e3d0a 100644
--- a/packages/react/src/components/DataTable/stories/dynamic-content/DataTable-dynamic-content.stories.js
+++ b/packages/react/src/components/DataTable/stories/dynamic-content/DataTable-dynamic-content.stories.js
@@ -249,13 +249,16 @@ export const Default = (args) => {
                   <TableBody>
                     {rows.map((row) => (
                       <React.Fragment key={row.id}>
-                        <TableExpandRow {...getRowProps({ row })}>
+                        <TableExpandRow
+                          {...getRowProps({ row })}
+                          aria-expanded={row.isExpanded}>
                           <TableSelectRow {...getSelectionProps({ row })} />
                           {row.cells.map((cell) => (
                             <TableCell key={cell.id}>{cell.value}</TableCell>
                           ))}
                         </TableExpandRow>
                         <TableExpandedRow
+                          aria-hidden={!row.isExpanded}
                           colSpan={headers.length + 3}
                           className="demo-expanded-td"
                           {...getExpandedRowProps({ row })}>
diff --git a/packages/react/src/components/DataTable/stories/expansion/DataTable-expansion.stories.js b/packages/react/src/components/DataTable/stories/expansion/DataTable-expansion.stories.js
index 9f8e4b6dd9e9..b30b6c5e64c3 100644
--- a/packages/react/src/components/DataTable/stories/expansion/DataTable-expansion.stories.js
+++ b/packages/react/src/components/DataTable/stories/expansion/DataTable-expansion.stories.js
@@ -83,6 +83,7 @@ export const Default = (args) => (
             {rows.map((row) => (
               <React.Fragment key={row.id}>
                 <TableExpandRow
+                  aria-expanded={row.isExpanded}
                   {...getRowProps({ row })}
                   onClick={action('onClick')}>
                   {row.cells.map((cell) => (
@@ -90,6 +91,7 @@ export const Default = (args) => (
                   ))}
                 </TableExpandRow>
                 <TableExpandedRow
+                  aria-hidden={!row.isExpanded}
                   colSpan={headers.length + 1}
                   className="demo-expanded-td"
                   {...getExpandedRowProps({ row })}>