Code Syntax Block extends the block editor by adding syntax highlighting to the core code block. In addition to styling your code blocks according to the language you specify, it also gives the option to show/hide line numbers and add a title for the code snippet.
I love plugins that do just enough to enhance your use of features that are already present in WordPress, but don't lock you in to use. This one does such a great job of that! Having six contributors shows that it's been a collaborative effort and that there are sure to be individuals wanting to keep it maintained moving forward. Awesome addition to the toolkit!
P.S. This here is just a screenshot. The real thing will allow users to copy/paste the code.