I don't know how to help you with your problem

I, too, find this very strange.

Thank you very much, though is there any way I can help this without adding content? I really am not able to add any more content to the site, as I am not the one writing...

You told it shows up around page 10. So it's indexed. A new domain, 94 days old with a DA 1 and a PA 1 needs time and work. Don't expect fast results. Ohter simple sites...

I have made much more simple sites like this, but they were indexed just fine. I have tried adding backlinks as well. Could there be any other issue here?

thanks for sharing good Information.

In your https://gro-usa.com/page-sitemap.xml are 2 links. Your https://gro-usa.com/post-sitemap.xml is empty. Add more informative, high-quality content for you visitors....

Yes, the website is in maintenance mode, though this is a recent thing that I implemented. This is absolutely not the cause of the issue. I have taken maintenance mode of...

Your website is in maintenance mode

There's a tweet about your issue from John Mu. https://twitter.com/JohnMu/status/1387874087045844996?s=20 Unfortunately there's a bug there in Search Console. When we we...