Sachkhand

I agree with the answer of the scholar. To add: Many conceptualize Sach Khand as a “heavenly abode”, a place where one’s spirit goes after death. Dera Babas after death are named Sachkhand Vasi. Historical Gurdwaras are also mentioned as Sachkhand Hazur Sahib, Sachkhand Damdama Sahib, Sachkhand Angitha Sahib etc.
Many take “Sach Khand Vasey Nirankar” literally without understanding its true meaning, and assume that Sachkhand is a place where God lives, whereas in Gurbani it is repeatedly and clearly stated that God is present in every molecule and resides in Its creation. It is important point to note that in Jap Bani Guru Nanak before describing Sach Khand describes Giyan Khand, Dharm Khand, Saram Khand and Karam Khand which are not geographical places and so is also Sach Khand. Sach Khand is the spiritual state of mind (Mann) when the mind (Mann) becomes one with Virtues of the God and there remains no difference between God and the devotee. In a way it is true that Sachkand is a place where God resides, which is everywhere ਆਪੀਨ੍ਹ੍ਹੈ ਆਪੁ ਸਾਜਿਓ ਆਪੀਨ੍ਹ੍ਹੈ ਰਚਿਓ ਨਾਉ ॥ ਦੁਯੀ ਕੁਦਰਤਿ ਸਾਜੀਐ ਕਰਿ ਆਸਣੁ ਡਿਠੋ ਚਾਉ ॥ Aapinai Aap Sajiou Aapinai Rachiou Nao || Duyi Kudarat Sajiai Kar Asan Dditho Chao || AGGS 463. It Itself created Itself; It itself created the code of conduct (Naam). Secondly, It fashioned the creation and seated within the creation and beholds it with delight. ਇਹੁ ਜਗੁ ਸਚੈ ਕੀ ਹੈ ਕੋਠੜੀ ਸਚੇ ਕਾ ਵਿਚਿ ਵਾਸੁ ॥ Eh Jag Sachai Ki Hai Kotharri Sachae Ka Vich Vas || AGGS 463. This world is the abode of the True God; within it is the dwelling of the True God which is the mind (Mann) ਮਨ ਤੂੰ ਜੋਤਿ ਸਰੂਪੁ ਹੈ ਆਪਣਾ ਮੂਲੁ ਪਛਾਣੁ ॥ Mann Toon Jot Saroop Hai Apana Mool Pachan || AGGS 441. So neither the historical Gurdwaras be called Sachkhand, dead Dera Babas be called “Sachkhand Vasi” nor Guru Nanak went to a geographical location called Sachkhand.