That tool maps where Durable Objects run, not Workers. Durable Objects run in more limited locations for their "Durableness". For example, writes have to be confirmed by multiple nearby data centers, if a location goes offline they have to be able to go to a near one, etc. So they basically have their own clusters/regions.

Workers run everywhere. On every location shown on that map. Granted, you need a special license and Enterprise feature to use the China ones.