Rendering many tiles without startTransition

ManyTiles.js

import * as React from 'react';
import {SafeAreaView, Text, View, ActivityIndicator} from 'react-native';

import Slider from '@react-native-community/slider';

function SliderHeader({
  value,
  onValueChange,
}: {
  value: number;
  onValueChange: (value: number) => void;
}) {
  const [isPending, startTransition] = React.useTransition();

  return (
    <>
      <View
        style={{
          flexDirection: 'row',
          justifyContent: 'space-between',
          paddingHorizontal: 8,
        }}>
        <Text style={{textAlign: 'center'}}>
          Render <Text style={{fontWeight: '500'}}>{value}</Text> Tiles{' '}
        </Text>
        <ActivityIndicator animating={isPending} />
      </View>

      <Slider
        value={1}
        minimumValue={1}
        maximumValue={1000}
        step={1}
        onValueChange={newValue => {
          // Do not mark this update as a transition
          onValueChange(newValue);
        }}
      />
    </>
  );
}
export default function ManyTiles() {
  const views = [];
  const size = 14;
  const [value, setValue] = React.useState(1);

  for (let i = 0; i < value; ++i) {
    const view = (
      <View
        key={i}
        style={{
          width: size,
          height: size,
          borderWidth: 0.5,
          backgroundColor: 'red',
        }}
      />
    );

    views.push(view);
  }

  return (
    <SafeAreaView style={{backgroundColor: 'white'}}>
      <SliderHeader onValueChange={setValue} value={value} />
      <View
        style={{
          flexDirection: 'row',
          flex: 1,
          flexWrap: 'wrap',
        }}>
        {views}
      </View>
    </SafeAreaView>
  );
}

Great work
I'll need more clearity on it please am a bit confuse on the workflow.