It depends on which axis. The black axis and the red axis have no sense of paragraph, so the sound will be smaller when pressed, and there will be no click.

Green axis tea axis must not be used in the library. Although typing feels good, the sound is too noisy.

I use Dell's EK820 Bluetooth mechanical keyboard. The fuselage is very thin, and the red axis version just meets your needs. And it's light and small, so it's convenient to take it out.