Remove Site Name from SERPs

I need help ensuring that Google no longer appends my website name to any of my blog-post listings. Every article currently shows up in Google as “Post Title | Site Name,” but I would like the listing to display only the post title itself for every blog post across the site.

I have full access to the CMS, so you are welcome to adjust global title-tag settings, theme templates, or SEO-plugin configurations as needed. Once the change is implemented, submit the updated URLs through Search Console so Google re-crawls them.

Deliverable:
• A live site where all blog post results in Google omit the site name, confirmed with fresh Search Console inspection links or screenshots.