diff --git a/packages/react-native/Libraries/Components/TextInput/TextInput.js b/packages/react-native/Libraries/Components/TextInput/TextInput.js
index 8b827ae1cc6969..7fe1210f8278d7 100644
--- a/packages/react-native/Libraries/Components/TextInput/TextInput.js
+++ b/packages/react-native/Libraries/Components/TextInput/TextInput.js
@@ -1646,6 +1646,10 @@ const ExportedForwardRef: React.AbstractComponent<
   let style = flattenStyle(restProps.style);
 
   if (style?.verticalAlign != null) {
+    if (Object.isFrozen(style)) {
+      // $FlowFixMe[incompatible-type]
+      style = {...style};
+    }
     // $FlowFixMe[prop-missing]
     // $FlowFixMe[cannot-write]
     style.textAlignVertical =
diff --git a/packages/react-native/Libraries/Text/TextOptimized.js b/packages/react-native/Libraries/Text/TextOptimized.js
index 615badd9ad6758..01cab7b5257df2 100644
--- a/packages/react-native/Libraries/Text/TextOptimized.js
+++ b/packages/react-native/Libraries/Text/TextOptimized.js
@@ -8,6 +8,7 @@
  * @format
  */
 
+import type {____TextStyle_Internal as TextStyleInternal} from '../StyleSheet/StyleSheetTypes';
 import type {PressEvent} from '../Types/CoreEventTypes';
 import type {NativeTextProps} from './TextNativeComponent';
 import type {PressRetentionOffset, TextProps} from './TextProps';
@@ -141,25 +142,32 @@ const TextOptimized: React.AbstractComponent<TextProps, TextForwardRef> =
 
       let _selectable = selectable;
 
-      const processedStyle = flattenStyle(_style);
+      let processedStyle: ?TextStyleInternal = flattenStyle(_style);
       if (processedStyle != null) {
+        let overrides: ?{...TextStyleInternal} = null;
         if (typeof processedStyle.fontWeight === 'number') {
-          // $FlowFixMe[cannot-write]
-          processedStyle.fontWeight = processedStyle.fontWeight.toString();
+          overrides = overrides || ({}: {...TextStyleInternal});
+          overrides.fontWeight =
+            // $FlowFixMe[incompatible-cast]
+            (processedStyle.fontWeight.toString(): TextStyleInternal['fontWeight']);
         }
 
         if (processedStyle.userSelect != null) {
           _selectable = userSelectToSelectableMap[processedStyle.userSelect];
-          // $FlowFixMe[cannot-write]
-          delete processedStyle.userSelect;
+          overrides = overrides || ({}: {...TextStyleInternal});
+          overrides.userSelect = undefined;
         }
 
         if (processedStyle.verticalAlign != null) {
-          // $FlowFixMe[cannot-write]
-          processedStyle.textAlignVertical =
+          overrides = overrides || ({}: {...TextStyleInternal});
+          overrides.textAlignVertical =
             verticalAlignToTextAlignVerticalMap[processedStyle.verticalAlign];
-          // $FlowFixMe[cannot-write]
-          delete processedStyle.verticalAlign;
+          overrides.verticalAlign = undefined;
+        }
+
+        if (overrides != null) {
+          // $FlowFixMe[incompatible-type]
+          processedStyle = [processedStyle, overrides];
         }
       }