Creating a replica in another region won't solve this.

As blocks in countries like china or Russia are usually caused by DNS or SNI filtering.

You can route traffic around these blocks by using a CDN like cloudflare

I can access your app.mestra.chat.

i know my app can accessed on other countries, i need everybody can access my application.

Follow this response

cdn is enabled but those users can not accessed to our servixe

Have you connected your domain to cloudflare?

yes

Creating another replica in a different region is not a guaranteed fix here.

If the issue is a regional runtime/network problem, then a replica may help. But if the problem is custom-domain routing, TLS/SNI binding, DNS, Cloudflare, or the application crashing due to the same environment variables, the new replica will inherit the same issue.

Also, mestra.chat being accessible does not prove app.mestra.chat is healthy, because they can be separate domains/services/routes. The main site can work while the app subdomain fails due to its own edge binding, DNS target, certificate, or backend health.

The correct next step is to verify the app service itself first:

1. Confirm the Railway/default service URL works.
2. Confirm app.mestra.chat points to the correct Railway service/domain target.
3. Check whether the app logs show a clean startup.
4. If backend logs show Hibernate/JDBC errors, fix the database variables first.
5. Only add another replica after the service is healthy, not as the first fix.

So my answer is: another region might help only for a regional availability issue, but it will not fix a broken domain binding or app/backend configuration problem.