I was in Indonesia about 20 days ago and Reddit worked fine for me
If you are using a US SIM card, e.g., all your traffic is tunneled to the US. That could be the reason.
Are you using 8.8.8.8? I occasionally bypass country “blocks” just by changing my DNS
I am Indonesian, reddit are blocked on most ISP. The Law is called "Internet Sehat dan Aman (INSAN)" or "Healthy and Safe Internet". It's very easy to circumvent, I use 1.1.1.1 app from cloudflare.