It used to be there, but was removed
https://github.com/NodeBB/NodeBB/commit/cb4930dac8854976b68a174ad4b65815f7e63f62#diff-949f495d29fabde280ed4c38b2eaef79a5313bda04f180faa594c135dfffa1ecL22
Not sure why
@inna feel free to open an issue on the Github page if you want this added back