It would be very costly to get tons of OCE/SEA regions their own servers, one option could be considered.
Guam:
AU:
Adelaide - 93ms
Brisbane - 82ms
Hobart - 92ms
Melbourne - 82ms
Sydney - 70ms
Perth - 124ms
NZ:
Auckland - 93ms
JP:
Tokyo - 29ms
AS:
Singapore - 65ms
With under 100ms for hundreds of millions of people, it could be a nice starting point.
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Comment by @WatchCollector67