do not render empty accordion on View, unless it have single content

src/components/manage/Blocks/Accordion/View.jsx

@@ -1,6 +1,6 @@
 import React from 'react';
 import { RenderBlocks } from '@eeacms/volto-blocks-form/components';
-import { getColumns } from './util';
+import { getColumns, GroupblockHasValue } from './util';
 import AccordionEdit from './AccordionEdit';
 const View = (props) => {
   const {
@@ -11,11 +11,11 @@ const View = (props) => {
   return (
     <div>
       {columnList.map(([id, column], index) => {
-        return (
+        return GroupblockHasValue(column) ? (
           <AccordionEdit data={data}>
             <RenderBlocks {...props} metadata={metadata} content={column} />
           </AccordionEdit>
-        );
+        ) : null;
       })}
     </div>
   );

src/components/manage/Blocks/Accordion/util.js

@@ -1,6 +1,12 @@
 import { v4 as uuid } from 'uuid';
 import { emptyBlocksForm } from '@eeacms/volto-blocks-form/helpers';
 import { settings } from '~/config';
+import { map } from 'lodash';
+import {
+  getBlocksFieldname,
+  getBlocksLayoutFieldname,
+  blockHasValue,
+} from '@plone/volto/helpers';
 
 export const empty = (count) => {
   const blocks = {};
@@ -25,3 +31,13 @@ export const getColumns = (data) => {
     data.blocks?.[id],
   ]);
 };
+
+export const GroupblockHasValue = (content) => {
+  const blocksFieldname = getBlocksFieldname(content);
+  const blocksLayoutFieldname = getBlocksLayoutFieldname(content);
+  const blockValue = map(content[blocksLayoutFieldname].items, (block) => {
+    const blockData = content[blocksFieldname]?.[block];
+    return blockHasValue(blockData);
+  });
+  return blockValue.length === 1 ? blockValue[0] : true;
+};