Hello,
Thank you for keeping in touch with us.
Upon checking your homepage, it seems to be correctly configured.
I also noticed that Google is still showing old cached pages on the search results. Please see example screenshot below:

Can you please follow these steps?
1. Flush the Sitemap cache by following this video screencast:
https://i.rankmath.com/pipRDp
2. Exclude the Sitemap files of the Rank Math plugin in your caching plugin. The cache could be via a plugin or from the server. For plugins or Cloudflare, please follow this article:
https://rankmath.com/kb/exclude-sitemaps-from-caching/
3. Remove all your sitemaps from your Google Search Console and re-submit only your primary sitemap (yourdomain.com/sitemap_index.xml). Give google some time to recrawl your website.
Let me know how it goes.
We are 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.