You are claiming that Allah sent prophets only to Arabia and surrounding area. And in your comment you said that you gained this idea by watching a video about the graves of all prophets and you saw they are all in this region.
First of all, where do you take your knowledge about prophets? From holy scriptures: Quran, Bible, Torah and Psalm. I don't know about the last 3, but in Quran, there are stories of 25 different prophets. Does this mean that this 25 prophets are all of the prophets through the history of mankind? No. Actually, there is a verse opposite of this:
And We certainly sent into every nation a messenger, [saying], "Worship Allah and avoid Taghut." And among them were those whom Allah guided, and among them were those upon whom error was [deservedly] decreed. So proceed through the earth and observe how was the end of the deniers. (Surat An-Naĥl 16/36)
If you search a little bit, you will find that the history of mankind is more than 100 thousand years, and the prophets mentioned in Quran lived in the last 5-6 thousand years (except Adam(puh)). Also more than few of this 25 names were the prophets of Jews. What about the rest of the world?
Second point is that, if you search a little bit about similarities between Hinduism and Islam, you will see videos of Dr. Zakir Naik claiming that in the most holy books of Hinduism (the Vedas), there is enough evidence to claim that Hinduism had a prophet once sent by Allah. This evidences including a prophecy about a prophet coming in the future which is clearly describing Mohammad(puh) and also nearly the same chapter with Surat Al-'Ikhlāş.
Now, about the graves of all prophets, there are 2 points on that. First, they are the graves of all known prophets (by Quran). The title is wrong. Secondly, I don't know how much genuine they are. In Turkey, there are graves of 2-3 prophets at least. Again in Turkey, there are 7 different mausoleums of the same person (a historical Turkish person). Who knows which one is genuine? Also some of the prophets lived thousands of years ago, who can be sure about their graves?