So, I was wondering if they win the Premier League this season will they be the first team to do so playing from a temporary stadium in country's top league? And if they are not the first team to do so, which club have done this and when?
A similar thing happened to Qarabağ FK (the first Azerbaijani team to make it to the group stage of the UEFA Champions League) in the Azerbaijan Premier League 1993. After the home city of the club Aghdam was attacked in June 12, 1993 and later occupied in July 23, 1993 by Armenian military forces and Qarabağ's home stadium "Imarat" was destroyed by bombardments, the team forced to move to the capital city Baku and eventually won the title in August 1, 1993.
There is Shakhtar Donetsk who won the Ukrainian championship in 2017, 2018 and 2019 by playing their home games in Lviv and Kharkiv while their main stadium is in Donetsk. The "Donbass Arena" has been unavailable since 2014 due to the conflict in Crimea.