Try wp_register_block_types_from_metadata_collection function

This was added in WordPress 6.8

Author: mleray

package.json

@@ -5,8 +5,8 @@
   "author": "Greenpeace International",
   "license": "GPL-3.0",
   "scripts": {
-    "start": "wp-scripts start --config webpack.config.js --mode=development",
-    "build": "wp-scripts build --config webpack.config.js --mode=production",
+    "start": "wp-scripts start --blocks-manifest --config webpack.config.js --mode=development",
+    "build": "wp-scripts build --blocks-manifest --config webpack.config.js --mode=production",
     "analyze": "wp-scripts build --config webpack.config.js --mode=production --env analyze",
     "lint:css": "npx stylelint 'assets/src/scss/**/*.scss'",
     "lint:js": "npx eslint 'assets/src/**/*.js' 'tests/e2e/**/*.js' 'admin/js/**/*.js'",
@@ -18,7 +18,7 @@
     "@playwright/test": "^1.49.1",
     "@wordpress/e2e-test-utils-playwright": "^1.16.0",
     "@wordpress/eslint-plugin": "^15.1.0",
-    "@wordpress/scripts": "^26.19.0",
+    "@wordpress/scripts": "^31.2.0",
     "ajv": "^8.7.1",
     "autoprefixer": "^9.6.1",
     "babel-loader": "^8.2.3",

src/Blocks/Register.php

@@ -6,7 +6,6 @@
 use P4\MasterTheme\Features\Planet4Blocks;
 use P4\MasterTheme\Patterns\BlockPattern;
 use P4\MasterTheme\View\View;
-use P4\MasterTheme\Blocks\BaseBlock;
 use RuntimeException;
 
 /**
@@ -217,11 +216,12 @@ public static function add_blocks(): void
         new Blocks\TakeActionBoxout();//NOSONAR
         new Blocks\Timeline();//NOSONAR
         new Blocks\SecondaryNavigation();//NOSONAR
-        Blocks\Register::registerFromAssets('TopicLink', [
-            'render_callback' => function ($attributes) {
-                return BaseBlock::render_frontend_from_blockname($attributes, 'planet4-blocks/topic-link');
-            },
-        ]);
+
+        // Register blocks from block.json files.
+        wp_register_block_types_from_metadata_collection(
+            get_template_directory() . '/assets/build/blocks/',
+            get_template_directory() . '/assets/build/blocks-manifest.php'
+        );
 
         $pattern_categories = [
             'page-headers' => 'Page Headers',