JetBrains IDEs arguably look/behave better than VSCode as far as a native app goes. I wouldn't say either look great on MacOS but a truly "native feeling" Mac app is usually quite different than a Linux/Windows equivalent.

I love JetBrains IDEs and have been using them for a decade, but I’d say their general behaviour as user interface is among their worst qualities. Chief of which being how any sort of dialogue or additional window is fully modal. Opening any of the settings windows for example completely locks you out of interacting with the main window.

I find them janky as hell, but their ability to wrangle code is top class.

I much prefer vscode to intellij

Long time ago, Apple had a proper OS X Swing L&F, when you could do Cocoa in Java, and there was still some uncertainty if Objective-C would be embraced by Mac OS development community.