Jinns have believers and non believers as we read in Quran in Sura Al-Jinn, verse 11. They will judged on the Day of Judgement and righteous faithful will be granted their reward, while non believers will get their punishment in hellfire (Many Jinns and humans will go to hellfire as they had hearts but they refused to understand the truth) (Sura 7, verse 179).
We are not concerned nor been asked to research or ask how and where Jinns will be. They belong to a different world from our world. There are thousands of different worlds created by Allah, and we are not concerned where they will be and how. We are concerned with own future and responsible to believe in and follow the Truth from The Prophet and Ahlul Bayt.