No, “:q” or “:quit” isn’t meant to work in Obsidian.
Are you just expecting that “:q” would turn off the keybindings? Or were you expecting it to do something different, like quit Obsidian, or close a note? Can you please explain?
Also please note that in Obsidian, you are not actually running Vim or using buffers. It’s a CodeMirror javascript library that only emulates a small subset of Vim. So any commands that would act on windows. or buffers or tabs or the program itself in Vim, will likely not work in Obsidian.