We do know that Allah is uncreated and he's always been there even before the universe and will be there after.
Sunan Ibn Majah 3873 (Sahih):
It was narrated from Abu Hurairah that :
when going to bed, the Prophet (saas) used to say: "Allahumma Rabbas-samawati wa Rabbal-ardi, wa Rabba kulli shay'in, faliqal-habbi wan-nawa, munzilat-Tawrati wal-Injili wal-Qur'anil-'Azim. A'udhu bika min sharri kulli dabbatin Anta akhidhun binasiyatiha, Antal-Awwalu fa laysa qablaka shayun, wa Antal-Akhiru, fa laysa ba'daka shayun', Antaz-zahiru, fa laysa fawqaka shayun', wa antal-batinu fa laysa dunaka shay', aqdi 'annid-dayna waghnini minal-faqr (O Allah, Lord of the heavens and Lord of the earth and Lord of all things, Cleaver of the seed and the kernel, Revealer of the Tawrah, the Injil and the Magnificent Qur'an, I seek refuge with You from the evil of every creature You seize by the forelock. You are the First and there is nothing before You; You are the Last and there is nothing after You; You are the Most High (Az-Zahir) and there is nothing above You, and You are the Most Near (Al-Batin) and there is nothing nearer than You. Settle my debt for me and spare me from poverty)."
But we'll never know with certainty what was before the universe, It'll always just be speculation.