Bani by Dharam Rai?

ਸਲੋਕੁ ॥ ਜਹ ਸਾਧੂ ਗੋਬਿਦ ਭਜਨੁ ਕੀਰਤਨੁ ਨਾਨਕ ਨੀਤ ॥ ਣਾ ਹਉ ਣਾ ਤੂੰ ਣਹ ਛੁਟਹਿ ਨਿਕਟਿ ਨ ਜਾਈਅਹੁ ਦੂਤ॥੧॥

This ਸਲੋਕੁ is considered to be uttered by Dharam Rai. I've been wondering, since this ਸਲੋਕੁ was uttered by him then why isn't Dharam Rai's name included alongside with all the recognized contributors of Bani in Sri Guru Granth Sahib Jee like the Gurus, Bhagats, Bhatts?

No it was not written by Dharam Rae keodn jee. It is Sri Guru Arjun Dev Sahib Jee telling us the instructions that Dharam Rae has given to his Jamdoots. We can see this because there is the stamp of "Nanak".