Hello,
Thank you for contacting Rank Math.
I checked the robots.txt file, it is loading fine:

If you want to manage the robots.txt file with Rank Math, you can add the rules in the Edit robots.txt option.
https://rankmath.com/kb/how-to-edit-robots-txt-with-rank-math/
Also checked the website on Bing using the site operator, the website is already indexed on Bing.
If the new posts/pages are not getting indexed, please check if the pages are correctly marked as an index in the Advanced Tab in SEO settings of the post/page:
https://rankmath.com/kb/advanced-tab/
Please note that it is completely up to Bing if they want to index or not index your website. So, if you haven’t willingly or accidentally made your posts noindex and Bing still isn’t indexing your page – it means that either Bing doesn’t want to index or hasn’t crawled your page yet because it hasn’t allocated that much crawl budget to your website.
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
Bing is crawling the pages but not indexing, same there with Google only showing 6 pages
Hello,
It completely depends on the search engine to index or not index the website.
You can try submitting the URLs in the URL Inspection Tool and request indexing, similarly, for Bing, you can submit the URLs manually in the Bing Webmaster Tools.
You can refer to these detailed guides for more information:
https://ahrefs.com/blog/google-index/
https://www.searchenginejournal.com/definitive-list-reasons-google-isnt-indexing-site/118245/”>check this website
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.