Selected title separator character not displaying

Hello,

Thank you for getting in touch and I am extremely sorry about the trouble this might have caused.
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Please check if your title/description is properly set up in the page source:
https://i.rankmath.com/HwXR1o. You can use this tool for the same as well: https://www.heymeta.com/

If this matches your settings, then you must check if Google has seen the changes already or not.
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For that, please check when the Google cache was updated for that page:
a.

b.

If the cache date is from before making the changes, then you just have to wait for Google to re-crawl and re-index the page with the new data. If the date is after you made the changes,
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​Do note that Google is known to sometimes ignore the custom meta info altogether. You can read more about it here

https://support.google.com/webmasters/answer/35624?hl=en

This section sheds light on that:

Why the search result title might differ from the page's <title> tag

Hope that helps. If you have any further question(s), please let us know.