As an Indonesian I could only say that yes, they blocked the 18+ content (some horror and other webtoon that's translated to Indonesian is left with some restriction warning) and lgbtq content on webtoon.
The Indonesian webtoon only hold the Indonesia language (a lotsa peoples simply didn't know English) translated webtoon plus local make webtoon (but if its changer to English in the settings, you still can find it on the search list, but I didn't downloaded the app, so this is limited to the web browser I have).
A lot of webtoon from other countries that's not translated (officially and fan translated) didn't exist there too. Btw, you're not in the search list cause your webcomic its not in bahasa Indonesia.