Google decides either automatically, or sometimes manually, whether to use your specific meta description, or, whether to extract what Google considers to be an acceptable meta description, from your page source text.
Try not to use ampersand (&) symbols, and hyphens in your meta description text (plus, best to avoid trademark symbols, copyright symbols, in fact any symbols). Just use pure factual text description or summary of your page, that doesn’t include any personal opinions or hyperbole.
Even after doing that, you may still need to be patient for changes to appear in Google search. To speed up, or prompt reindexing by Google, you could try deleting your existing sitemap.xml file, and then resubmitting your sitemap.xml file in Google Search Console.