In Nuxt Content, it is really easy to create a sitemap of all your pages.

// api/routes/sitemap.ts
import { SitemapStream, streamToPromise } from 'sitemap';
import { serverQueryContent } from '#content/server';

export default defineEventHandler(async (event) => {
    const docs = await serverQueryContent(event).find();

    const staticSites = [
        {
            _path: '/'
        },
        {
            _path: '/about'
        },
        {
            _path: '/open-source'
        }
    ];

    const sitemapElements = [...staticSites, ...docs];

    const sitemap = new SitemapStream({
        hostname: import.meta.env.VITE_BASE_URL as string
    });

    for (const doc of sitemapElements) {
        sitemap.write({
            url: doc._path,
            changefreq: 'monthly'
        });
    }

    sitemap.end();
    return streamToPromise(sitemap);
});