It's a bit inconvenient that one has to move the point to the highlighted region to see the sideline message. lsp-ui <img width="965" alt="Screenshot 2023-11-19 at 15 24 43" src="https://github.com/emacs-sideline/sideline-flycheck/assets/5475262/14c10524-5aaf-455b-89af-27ebf7b90ba5"> sideline <img width="968" alt="Screenshot 2023-11-19 at 15 26 25" src="https://github.com/emacs-sideline/sideline-flycheck/assets/5475262/10c308da-dda3-4ad1-83a2-f0d92331f1ba">