Looks like VS Code. They copied the bad design.
And even the new IDEA UI (which is still opt-in, thank god - I tried it but moved back because the "old" UI is just clearly more ergonomic to me) is clearly VSCode-like.
my guess is jetbrains sees the trend and wants to keep up, but if all the editors look the same as vs-code how do you differentiate?
Lately I've been using Zed, but I'll have to switch back eventually because the Windows support is terrible (I know, I know, it was designed for macOS).
It's as simple as right click it -> Activity Bar Position -> ...