Christians in Indonesia are not uniformly spread throughout the country, but are more or less common in certain settlements or regions. As you noted, Christians make up 10% of the population of Indonesia as a whole, but they represent 72.57% of the population of its South Papua Province, for example. And within South Papua Province, we find they constitute 93% of the population of Asmat Regency.
Is it possible that your dating app geolocates its users at a sub-national level of precision? Maybe it has permissions to access the coordinates returned by your device’s GPS connection, or if you connect from a local WiFi network, maybe it uses your IP to narrow down your location within the country. So when users of the app tell it to look for potential matches, it could be prioritizing profiles of physically nearby users. And in your case, maybe you were travelling through areas of Indonesia that happened to have a proportion of Christians more in line with what you observed from the app.
Sex outside of marriage is a big no-no in theory, and I remember reading that it was legally forbidden to have “guests” in your hotel room, yet in practice it was not very difficult to find places where no questions were asked. Admittedly, I was in a city that has a reputation for being relatively liberal. It may be very different in other places.
One thing that I find both puzzling and mildly amusing was that Catholics are called Katolik while Protestants are called Kristen. I mean, both are Christians to me…
That is certainly not true of all Muslims in all of Indonesia: it has been heavily influenced by SA money and training. One of my friends was confronted and had to do some rapid apologies and re-decoration after they illustrated a dragon on a village project.
Yes, as I noted above, I was staying in a relatively liberal city.
Still, I noticed that the overwhelming majority of women were veiled, to an extent I had not seen in some other Muslim countries, and that included very young girls, about 4 or 5 years old.
There are large regional differences. @Moonrise said they had been to Bali and Java. I am currently in Bali, according to wiki it is 87% Hindu and certainly that fits what I have seen (lots of Hindu temples and a few mosques. I have not used any dating apps however.
Bali has definitely a very different vibe, for the reason that you point out.
In Java, it seems to depend a lot on where you are, although the Javanese are 90% Muslim. Where I stayed, some decidedly non-halal things were relatively easy to find and do as long as you were discreet about it. However, I was told it would have been impossible in other parts of the island.