And of his signs is the creation of the heavens and earth (42:29)

﴿وَمِنْ آيَاتِهِ خَلْقُ السَّمَاوَاتِ وَالْأَرْضِ وَمَا بَثَّ فِيهِمَا مِن دَابَّةٍ ۚ وَهُوَ عَلَىٰ جَمْعِهِمْ إِذَا يَشَاءُ قَدِيرٌ﴾
[ الشورى: 29]

42:29 And of his signs is the creation of the heavens and earth and what He has dispersed throughout them of creatures. And He, for gathering them when He wills, is competent.

One of the signs of Allah that prove His power and oneness is the creation of the heavens and the creation of the earth, and the wondrous creations that He spread throughout them.
He is able to bring them all together for the gathering and recompense whenever He wills.
He is not incapable of doing this just as He was not incapable of creating them the first time.

And among His Ayat (proofs, evidences, lessons, signs, etc.) is the creation of the heavens and the earth, and whatever moving (living) creatures He has dispersed in them both. And He is All-Potent over their assembling (i.e. resurrecting them on the Day of Resurrection after their death, and dispersion of their bodies) whenever He will.

phonetic Transliteration

Wamin ayatihi khalqu alssamawati waalardi wama baththa feehima min dabbatin wahuwa AAala jamAAihim itha yashao qadeerun

Abdullah Yusuf Ali - Translation

And among His Signs is the creation of the heavens and the earth, and the living creatures that He has scattered through them: and He has power to gather them together when He wills.

Safi-ur-Rahman al-Mubarakpuri

And among His Ayat is the creation of the heavens and the earth, and whatever moving creatures He has dispersed in them both. And He is Able to assemble them whenever He wills.

Page 486 English transliteration