Hello,
Thank you for contacting Rank Math support, and sorry for any inconvenience that might have been caused due to that.
I checked your settings and it seems that your website is already set to index in the robots meta.
Please head over to Google Search Console and look for any coverage issue so we can further determine what’s causing Google to not index some of your website’s pages/posts.
In addition to that, your robots.txt is configured to follow this sitemap: https://yourdomain.com/sitemap.xml

However, you are using a different sitemap URL from a different SEO tool. This might confuse the Search Engines.
I would suggest making use of Rank Math’s default robots.txt configuration and sitemap generator instead.
https://rankmath.com/kb/how-to-edit-robots-txt-with-rank-math/#default-rules
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.