Help with Spacer width

I am new to WordPress and am trying to update our webpage to include a full width line spaced that spans across the width of the page, but it won’t extend beyond 75% despite being in “wide width.”

I have tried customizing the CSS for the block to is-style-wide and even tried adjusting the width in the html (probably incorrectly) but nothing has worked 🙁

Any ideas on how I can get a full width spacer on my page? Really appreciate the help!

Edit: The page is pacificwolves.org/news