diff --git a/packages/react-native/scripts/spm/autolinking-plugins.js b/packages/react-native/scripts/spm/autolinking-plugins.js
index e2b18a979dc7..c218a3960264 100644
--- a/packages/react-native/scripts/spm/autolinking-plugins.js
+++ b/packages/react-native/scripts/spm/autolinking-plugins.js
@@ -117,7 +117,7 @@ function discoverPlugins(
       );
     }
     const pluginPath = path.resolve(dep.root, rel);
-    let fn: unknown;
+    let fn /*: unknown */ = null;
     try {
       // $FlowFixMe[unsupported-syntax] dynamic require by computed path
       fn = require(pluginPath);
@@ -175,7 +175,7 @@ function invokePlugins(
   const seenFrameworkNames /*: Set<string> */ = new Set();
 
   for (const {depName, pluginPath, plugin} of plugins) {
-    let result: unknown;
+    let result /*: unknown */ = null;
     try {
       result = plugin(context);
     } catch (e) {
diff --git a/packages/react-native/scripts/spm/download-spm-artifacts.js b/packages/react-native/scripts/spm/download-spm-artifacts.js
index 416db6080b8e..4faa4331154c 100644
--- a/packages/react-native/scripts/spm/download-spm-artifacts.js
+++ b/packages/react-native/scripts/spm/download-spm-artifacts.js
@@ -943,7 +943,7 @@ async function processArtifact(
     return localPath;
   };
 
-  let tarPath: string;
+  let tarPath /*: string */ = '';
   let fromShared = false;
   if (isLocalTarball) {
     tarPath = url;
@@ -970,7 +970,7 @@ async function processArtifact(
     onProgress(xcframeworkName, 0, 0, 0, false, 0);
   }
   const tmpExtractDir = path.join(outputDir, '.extract-tmp', label);
-  let xcfwPath: string;
+  let xcfwPath /*: string */ = '';
   try {
     xcfwPath = extractXCFramework(tarPath, tmpExtractDir);
   } catch (e) {
@@ -1349,7 +1349,7 @@ function validateArtifactsCache(
   if (!fs.existsSync(artifactsJsonPath)) {
     return `artifacts.json missing in ${artifactsDir}`;
   }
-  let json: {[string]: {xcframeworkPath: string, url: string}};
+  let json /*: {[string]: {xcframeworkPath: string, url: string}} */ = {};
   try {
     // $FlowFixMe[unclear-type] JSON.parse returns any
     const parsed /*: any */ = JSON.parse(
diff --git a/packages/react-native/scripts/spm/generate-spm-autolinking.js b/packages/react-native/scripts/spm/generate-spm-autolinking.js
index 78cada1ad91c..058d6c3e4da2 100644
--- a/packages/react-native/scripts/spm/generate-spm-autolinking.js
+++ b/packages/react-native/scripts/spm/generate-spm-autolinking.js
@@ -426,7 +426,7 @@ function hasMixedLanguageSources(absSource /*: string */) /*: boolean */ {
   let hasClang = false;
   const walk = (dir /*: string */, depth /*: number */) => {
     if (depth > 6 || (hasSwift && hasClang)) return;
-    let entries: Array<{name: string, isDirectory(): boolean}>;
+    let entries /*: Array<{name: string, isDirectory(): boolean}> */ = [];
     try {
       // $FlowFixMe[incompatible-type] Dirent typing
       entries = fs.readdirSync(dir, {withFileTypes: true});
diff --git a/packages/react-native/scripts/spm/generate-spm-xcodeproj.js b/packages/react-native/scripts/spm/generate-spm-xcodeproj.js
index 0bb3467995c5..e75af429ce29 100644
--- a/packages/react-native/scripts/spm/generate-spm-xcodeproj.js
+++ b/packages/react-native/scripts/spm/generate-spm-xcodeproj.js
@@ -1799,13 +1799,13 @@ function readGeneratedSourcesManifest(
   appRoot /*: string */,
 ) /*: Array<GeneratedSource> */ {
   const manifestPath = path.join(appRoot, SPM_GENERATED_SOURCES_MANIFEST);
-  let raw: string;
+  let raw /*: string */ = '';
   try {
     raw = fs.readFileSync(manifestPath, 'utf8');
   } catch {
     return [];
   }
-  let entries: unknown;
+  let entries /*: unknown */ = null;
   try {
     entries = JSON.parse(raw);
   } catch {
@@ -1860,7 +1860,7 @@ function readMarker(
 // build-time sync (sync-spm-autolinking.js, via readArtifactsVersionOverride
 // below) to call without pulling in any pbxproj-editing machinery at runtime.
 function findInjectedXcodeproj(appRoot /*: string */) /*: string | null */ {
-  let entries: Array<{name: string, isDirectory(): boolean}>;
+  let entries /*: Array<{name: string, isDirectory(): boolean}> */ = [];
   try {
     // $FlowFixMe[incompatible-type] Dirent typing
     entries = fs.readdirSync(appRoot, {withFileTypes: true});
diff --git a/packages/react-native/scripts/spm/scaffold-package-swift.js b/packages/react-native/scripts/spm/scaffold-package-swift.js
index 073ea0a23962..6d52f60760b8 100644
--- a/packages/react-native/scripts/spm/scaffold-package-swift.js
+++ b/packages/react-native/scripts/spm/scaffold-package-swift.js
@@ -197,7 +197,7 @@ function collectSubdirs(
   ]);
   const out /*: Array<string> */ = [];
   const walk = (absDir /*: string */, relDir /*: string */) => {
-    let entries: Array<{name: string, isDirectory(): boolean}>;
+    let entries /*: Array<{name: string, isDirectory(): boolean}> */ = [];
     try {
       // $FlowFixMe[incompatible-type] Dirent typing
       entries = fs.readdirSync(absDir, {withFileTypes: true});
@@ -930,7 +930,7 @@ function scaffoldPackageSwiftForDep(
     };
   }
 
-  let model: PodspecModel;
+  let model;
   try {
     model = readPodspec(podspecPath);
   } catch (e) {
@@ -1126,7 +1126,7 @@ function scaffoldAll(
     directDeps.push({name, root, platforms: {ios: iosPlatform}});
   }
 
-  let allDeps: Array<AutolinkedDep>;
+  let allDeps /*: Array<AutolinkedDep> */ = [];
   try {
     allDeps = expandSpmDependencies(directDeps, {
       readConfig: defaultReadConfig,