Apparently, so many preprints have been written using Indonesia as a subject, topic, or title. If you go to OSF Preprints then search with key word “Indonesia”, you can get 2 million + of docs. Here’s the plot and here’s the data.
And if you filter “OSF Preprints”, here’s one of the article, written by Baskoro Lokahita.
Read also this Medium article on preprint vs post print (in Indonesian language).