[Risolto] not good seo title

Background of the issue:
I am trying to ensure that my website, link nascosto, is using the correct SEO data from RankMath. I do not use the Yoast SEO plugin.

Symptoms:
The SEO title is not good, and the site is pulling SEO data from another website instead of RankMath.

Questions:
Why is my site pulling SEO data from another website instead of RankMath?
How can I ensure that my site uses SEO data from RankMath?