Question: ًWhat can you tell us about the Earth with two sunrises and two sunsets? (Hollow Earth)?

This is where Adam's heaven/garden of eden is located INSIDE earth in a hollow space. This is the heaven that Adam had to leave and come to the surface.
The entrance is from the North and from the South and is explains the so called aurora lights which scientists today have fabricated as being magnetic particles from the sun reflecting within the atmosphere.

This Earth is now inhabited with the false messiah who sometimes comes out to the surface and goes back inside. It is also inhabited with other beings like Gog and Magog and their offsprings (by intermarrying from humans creating mis-formed creations).

وَلَأُضِلَّنَّهُمْ وَلَأُمَنِّيَنَّهُمْ وَلَآمُرَنَّهُمْ فَلَيُبَتِّكُنَّ آذَانَ الْأَنْعَامِ وَلَآمُرَنَّهُمْ فَلَيُغَيِّرُنَّ خَلْقَ اللَّهِ ۚ وَمَن يَتَّخِذِ الشَّيْطَانَ وَلِيًّا مِّن دُونِ اللَّهِ فَقَدْ خَسِرَ خُسْرَانًا مُّبِينًا
I will mislead them, and I will create in them false desires; I will order them to slit the ears of cattle, and to deface the (fair) nature created by Allah." Whoever, forsaking Allah, takes satan for a friend, hath of a surety suffered a loss that is manifest.

This is also where you will find the barrier of Zul Qarnein and all forms of other beings from the Jin. All in line with the ayah:

لَهُ مَا فِي السَّمَاوَاتِ وَمَا فِي الْأَرْضِ وَمَا بَيْنَهُمَا وَمَا تَحْتَ الثَّرَىٰ
To Him belongs what is in the heavens and on earth, and all between them, and all beneath the soil.

Some people call it Hollow earth,
In koran its mentioned as the two sunrises and two sunsets.
This is the Earthly (Jannah) inside earth
which is different than the (heavenly) Jannah
in line with the verse of the koran:
وَإِن كَانَ كَبُرَ عَلَيْكَ إِعْرَاضُهُمْ فَإِنِ اسْتَطَعْتَ أَن تَبْتَغِيَ نَفَقًا فِي الْأَرْضِ أَوْ سُلَّمًا فِي السَّمَاءِ فَتَأْتِيَهُم بِآيَةٍ ۚ وَلَوْ شَاءَ اللَّهُ لَجَمَعَهُمْ عَلَى الْهُدَىٰ ۚ فَلَا تَكُونَنَّ مِنَ الْجَاهِلِينَ
If their spurning is hard on thy mind, yet if thou wert able to seek a tunnel in the ground or a ladder to the skies and bring them a sign,- (what good?). If it were Allah.s will, He could gather them together unto true guidance: so be not thou amongst those who are swayed by ignorance (and impatience)!

The Hollow earth has two entrances. One from the north and One from the south pole so when the sun shines from one entrance it also shines to the other exit/entrance. hence the ayah:
رَبُّ الْمَشْرِقَيْنِ وَرَبُّ الْمَغْرِبَيْنِ
(He is) Lord of the two Easts and Lord of the two Wests:

One day of Hollow earth:
The north pole/south pole only shift their location from winter to summer and from summer to during the normal days hollow earth has no sun rise or sun set...the sun sets/rises only during the rotation of earth around the sun.

Hence one day (sun rise + sun set) of hollow earth = 360 earth days.
1 hollow earth day = 1 Earth year
(One day like a year)