Thank you for your question.
We have been informed that 124,000 prophets have been sent to Mankind to guide them to the right path, however, the Qur'an and ahadith only mention approx 25 prophets by name. This means we have not been told about all the other prophets or their location. Undoubtedly, due to the justice of Allah, He would have ensured all people had access to a guide. We cannot conclude that all prophets were sent to Arabia simply because the majority of the prophets we are aware of were from around that region.