You don’t necessarily need to restart, but region signals on TikTok are strong early on. SIM country, IP location, early viewers, and language all influence who sees your content first. If your first audience is mostly Thailand, TikTok will keep testing there unless it gets strong signals from UK or US viewers.
You can sometimes “coach” it by consistently posting in English, using UK or US topics, engaging with UK or US creators, and getting comments from that audience. Over time it can shift, but it’s slow and not guaranteed. If early viewers don’t engage, the content keeps getting recycled locally.
Starting fresh with the right signals from day one is usually cleaner. But VPN-only setups can be risky, sudden location mismatches sometimes reduce trust. The safest path is consistency: same region signals, same language, same audience intent.
Another approach is testing both. Keep the current account and start a new one with clearer targeting, then compare. Some creators even map content angles and hooks first using Runable, then post the strongest ones on the new account to accelerate targeting.
Since you already tried the new setup and it worked, that’s a good sign. Just stay consistent so TikTok keeps reinforcing the same audience.