Hello,
Thank you for contacting Rank Math, and sorry for any inconvenience caused.
I checked your website on Google, most of the pages are indexed on Google, as the URL is on Google, there is technically no reason for it to not be included in Bing, unless Bing has some reason to not index a page like DMCA, copyright content, nulled content, copied content, etc.
You can contact Bing support and ask them the reason as from checking the page’s source code, there are no apparent issues.
You can refer to all the Webmaster Guidelines and see if your website is violating any guidelines.
You could also try various site audit tools to check if there is an issue with your website.
I hope this helps. Looking forward to helping you.
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.