tbf, Bali is the only island in Indonesia that's majority non-Muslim (I think they're Buddhist majority) but even then that's like a 4 million people in a population of over 280 million. So 99% of Indonesians will basically be Muslim anyways.
View attachment 7180881
Though Islam in Indonesia is pretty much like Islam in the Balkans.
View attachment 7180873
It's basically just a cultural thing, people will still drink and watch porn while they go 'allahu ackbar' whenever they flex their country's culture. Officially, Indonesia is supposed to be secular since the country was founded by Sukarno who's basically an Ataturk LARPer. It helps that Indonesia got Islam via cynical reasons (aka to boost trade relations with Middle East) rather than by the sword.