diff --git a/api/register-block-extension/index.tsx b/api/register-block-extension/index.tsx
index 32766464..0c82a4e9 100644
--- a/api/register-block-extension/index.tsx
+++ b/api/register-block-extension/index.tsx
@@ -49,6 +49,10 @@ function registerBlockExtension(
 		return blockType === blockName;
 	};
 
+	if (blockName === '*') {
+		blockName = 'all';
+	}
+
 	const blockNamespace = isMultiBlock ? blockName.join('-') : blockName;
 
 	const addAttributesToBlock = (settings: Record<string, any>, name: string) => {
diff --git a/components/post-meta/index.tsx b/components/post-meta/index.tsx
index fdec1f2a..2c954b81 100644
--- a/components/post-meta/index.tsx
+++ b/components/post-meta/index.tsx
@@ -1,11 +1,14 @@
 import { RichText } from '@wordpress/block-editor';
 import { __experimentalNumberControl as NumberControl, ToggleControl } from '@wordpress/components';
 import type { ToggleControlProps } from '@wordpress/components/src/toggle-control/types';
-import { usePostMetaValue, useIsSupportedMetaField } from '../../hooks';
+import { usePostMetaValue, useIsSupportedMetaField, usePost } from '../../hooks';
 import { toSentence } from './utilities';
 
 interface MetaStringProps
-	extends Omit<React.ComponentPropsWithoutRef<typeof RichText>, 'value' | 'onChange'> {
+	extends Omit<
+		React.ComponentPropsWithoutRef<typeof RichText>,
+		'value' | 'onChange' | 'multiline'
+	> {
 	/**
 	 * The meta key to use.
 	 */
@@ -13,15 +16,20 @@ interface MetaStringProps
 }
 
 const MetaString: React.FC<MetaStringProps> = (props) => {
-	const { metaKey, tagName = 'p' } = props;
+	const { metaKey, tagName = 'p', ...rest } = props;
 	const [metaValue, setMetaValue] = usePostMetaValue<string>(metaKey);
+	const { isEditable } = usePost();
+
+	if (!isEditable) {
+		return <RichText.Content value={metaValue ?? ''} tagName={tagName} {...props} />;
+	}
 
 	return (
 		<RichText
 			value={metaValue ?? ''}
 			onChange={(value: string) => setMetaValue(value)}
 			tagName={tagName}
-			{...props}
+			{...rest}
 		/>
 	);
 };
@@ -34,14 +42,16 @@ interface MetaNumberProps {
 }
 
 const MetaNumber: React.FC<MetaNumberProps> = (props) => {
-	const { metaKey } = props;
+	const { metaKey, ...rest } = props;
 	const [metaValue, setMetaValue] = usePostMetaValue<number>(metaKey);
+	const { isEditable } = usePost();
 
 	return (
 		<NumberControl
 			value={metaValue}
 			onChange={(value) => setMetaValue(parseInt(value ?? '', 10))}
-			{...props}
+			disabled={!isEditable}
+			{...rest}
 		/>
 	);
 };
@@ -54,10 +64,18 @@ interface MetaBooleanProps extends Pick<ToggleControlProps, 'label'> {
 }
 
 const MetaBoolean: React.FC<MetaBooleanProps> = (props) => {
-	const { metaKey } = props;
+	const { metaKey, ...rest } = props;
 	const [metaValue, setMetaValue] = usePostMetaValue<boolean>(metaKey);
+	const { isEditable } = usePost();
 
-	return <ToggleControl checked={metaValue} onChange={setMetaValue} {...props} />;
+	return (
+		<ToggleControl
+			checked={metaValue}
+			onChange={setMetaValue}
+			disabled={!isEditable}
+			{...rest}
+		/>
+	);
 };
 
 interface PostMetaProps {