Why are there only one billion Muslims out of five billion people, and how many of them know nothing more about Islam than its name, and when will the religion of Allah be glorified?

Among the Sunan (ways) of Allah is the abundance of the people of falsehood and the scarcity of the people of truth, as mentioned in the Quran. However, this does not mean despair for Muslims, as the number of Muslims is increasing. Muslims must strive to spread Islam and achieve empowerment for it by adhering to the commands of Allah, enjoining what is right and forbidding what is wrong, inviting to Islam with wisdom, and supporting the religion of Allah, so that Allah's promise of victory and empowerment may be fulfilled for them.