Sitemap not showing all the blog URLs

We have recently updated the Ghost latest version - v5.47 on our blog site. After updating the latest version, the older blogs were removed from the sitemap file. It only showing few our blog posts not all.

Our website -

This is the screenshot of our current sitemap file. We have more 100 blogs, but the sitemap not showing all the blogs.

Is there any way to edit or update the sitemap manually in Ghost?

I believe using routes.yaml that you can direct traffic for the sitemap to a page that you create yourself using the template language.

You may also need to read about Ghost templating and the content API to complete that project.

We have checked the routes file and everything. Still, the newly published blog URLs also not update in sitemap.

This is our recently published blog -

And find the screenshot of the sitemap below,