new text editor block that contains core blocks as inner blocks and prevents them from being used at top level

resources/js/lib/isInsideBlock.js

@@ -0,0 +1,12 @@
+export default function isInsideMyACFBlock(blockName)
+{
+  const editor = wp.data.select('core/block-editor');
+  const selectedId = editor.getSelectedBlockClientId();
+
+  if (!selectedId) return false;
+
+  const parents = editor.getBlockParents(selectedId);
+  const parentNames = parents.map(id => editor.getBlockName(id));
+
+  return parentNames.includes(blockName);
+}