There have been many prophecies fulfilled by Prophet Muhammad ﷺ, these are two prophecies as an example:
Muslims Fighting the Mongols
Prophet Muhammad ﷺ predicted that we will fight the Mongols. This occurred in the 13th century, i.e. 600 years after the death of Prophet Muhammad ﷺ.
Prophet Muhammad ﷺ said:
“One of the portents of the Hour is that you will fight with people wearing shoes made of hair; and one of the portents of the Hour is that you will fight with broad-faced people whose faces will look like shields coated with leather.” ( Al-Bukhari )
He ﷺ also said:
The hour will not be established till Moslems fight with people with whose faces will look like the shields with coated with leather .they will wear uniforms made of hair and they will wear shoes made of hair . (Muslim)
The Turks mentioned are not the Turks present now in Asia Minor, but their origin was Mongolia which was the home land of Turks and Mongols, this was from the sixth to 13th century see here.
High Buildings in Arabia
Another prophecy which was fulfilled in our age is that mentioned in Bukhari when Gabriel came to the Prophet ﷺ in a form of man in front of his disciples, he came and asked the Prophet ﷺ (as an educative way to the disciples), from these questions that he asked him:
When will the Hour (Last Day) come?
The Prophet ﷺ said:
I don’t know (since God only knows it)
So Gabriel asked him: So tell me about its signs?
The Prophet ﷺ answered him:
That the maid would beget her master, and that the bare footed naked shepherds exceed in buildings.
Now let’s look at a city like Dubai or Abu Dhabi or Riyadh or Kuwait or Jeddah, look at the Gulf cities and compare their picture nowadays with their picture 40 years ago, you will see how this prophecy was exactly fulfilled.