Should ‘In My Father’s House’ be taken literally?

In John 14:1–3,

famously, Jesus declares as follows.

Let not your heart be troubled, you believe in God, believe also in Me; In my Father’s house are many mansions; if it were not so, I would have told you. I go to prepare a place for you. And if I go and prepare a place for you, I will come again and receive you to Myself; that where I am, there you may be also.

The conventional interpretation of the passage above asserts Jesus refers to physical mansions being prepared either right here on earth, or in heaven for those who believe in Him. If the ‘New Jerusalem’ that comes down from heaven in Revelation 21:1–4 is home to such physical mansions, then both sides are sequentially right. The physical mansions initially are prepared in heaven, that is, in God’s ‘House’, but then, in form of the New Jerusalem, come down to earth.

The only snag to the supposedly feasible sequential interpretation?

In the description of the New Jerusalem, only Foundations and Walls and Gates are described (Revelation 21:9–27), there is not any description of houses or domiciles inside the city.

What then are described as being in the city (Revelation 22:1–2)?

The Throne of God and of The…