To add meta tags to your pwa modify the useHead section inside the script tag of your page.
In our example we added the page title, but of course you can provide a description or any other tag you want. For detailed information on what is possible please refer to the Nuxt documentation on meta tags.
// ~/pages/[...slug].ts
...
<script setup lang="ts">
...
useHead({
title: currentPage.value?.data["pt_title"],
});
</script>