How might the spread of islam have contributed to muslim success in trade

Two ways in which the spread of Islam contributed to Muslim trade success was that:

With more areas becoming Islamic, it meant that when Muslim traders arrived, they were welcomed into the area more easily which allowed them to sell their wares with little disturbance.

They also gain priority over over sellers such as Christians and Jews in Muslim areas which allowed them great success.

In conclusion, being a Muslim trader in a Muslim area was beneficial.

Find out more on Muslim trade at link.