Expo - reduce PDF filesize on iOS devices

I have the same problem, I change my pdf creator because html creates variable size pdf and it depends on the resolution device, I use pdf-lib it works in javascript, you can create or modify pdf, I write small example in Expo , I plan to create a library to do Additional, you can fill PDF NOTE: it similar to react-native-pdf-lib but working in only enviroment javascript

My App.tsx example:

import React from "react";
import { StyleSheet, View, Text, Button } from "react-native";
import { Asset } from "expo-asset";
import * as Print from "expo-print";
import { degrees, PDFDocument, rgb, StandardFonts } from "pdf-lib";

export default function App({ context }: any) {
  return (
    <View style={styles.container}>
      <Button
        title="Generate PDF"
        onPress={async () => {
          const req = new XMLHttpRequest();
          /* const templateUri = Asset.fromModule(
            require("./assets/template.pdf")
          );
          console.log(templateUri); */
          const url =  'https://pdf-lib.js.org/assets/with_update_sections.pdf' // templateUri.uri
          req.open("GET", url, true);
          req.responseType = "blob";
          /*   req.onprogress = e => (t.progress = e.loaded); */
          req.onload = () => {
            const blob = req.response;
            var reader = new FileReader();
            reader.readAsDataURL(blob);
            reader.onloadend = async function() {
              const base64data = reader.result as string; // template pdf in base64
              const pdfDoc = await PDFDocument.load(base64data);
              const helveticaFont = await pdfDoc.embedFont(
                StandardFonts.Helvetica
              );

              const pages = pdfDoc.getPages();
              const firstPage = pages[0];
              const { width, height } = firstPage.getSize();
              console.log(width, height);
              firstPage.drawText('This text was added with JavaScript!', {
                x: 5,
                y: height / 2 + 300,
                size: 50,
                font: helveticaFont,
                color: rgb(0.95, 0.1, 0.1),
                rotate: degrees(-45),
              });

              const pdfDataUri = await pdfDoc.saveAsBase64({ dataUri: true });
              Print.printAsync({ uri: pdfDataUri });
            };
          };
          req.onerror = console.error;
          req.send();
        }}
      />
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: "#fff",
    alignItems: "center",
    justifyContent: "center"
  }
});