diff --git a/native/account/registration/registration-terms.react.js b/native/account/registration/registration-terms.react.js
--- a/native/account/registration/registration-terms.react.js
+++ b/native/account/registration/registration-terms.react.js
@@ -67,6 +67,27 @@
     }
   }, [register, userSelections, clearCachedSelections]);
 
+  const { navigation } = props;
+  React.useEffect(() => {
+    if (!registrationInProgress) {
+      return undefined;
+    }
+    navigation.setOptions({
+      gestureEnabled: false,
+      headerLeft: null,
+    });
+    const removeListener = navigation.addListener('beforeRemove', e => {
+      e.preventDefault();
+    });
+    return () => {
+      navigation.setOptions({
+        gestureEnabled: true,
+        headerLeft: undefined,
+      });
+      removeListener();
+    };
+  }, [navigation, registrationInProgress]);
+
   const styles = useStyles(unboundStyles);
 
   const termsNotice = (
diff --git a/native/flow-typed/npm/@react-navigation/core_v6.x.x.js b/native/flow-typed/npm/@react-navigation/core_v6.x.x.js
--- a/native/flow-typed/npm/@react-navigation/core_v6.x.x.js
+++ b/native/flow-typed/npm/@react-navigation/core_v6.x.x.js
@@ -1373,7 +1373,7 @@
     +headerTitleContainerStyle: AnimatedViewStyleProp,
     +headerTintColor: string,
     +headerTitleAllowFontScaling: boolean,
-    +headerLeft: NavHeaderLeftProps => React$Node,
+    +headerLeft: null | (NavHeaderLeftProps => React$Node),
     +headerLeftContainerStyle: AnimatedViewStyleProp,
     +headerRight: NavHeaderRightProps => React$Node,
     +headerRightContainerStyle: AnimatedViewStyleProp,