Are my two sons, Muhammad and Islam, considered martyrs, and what are my responsibilities as their father after their passing, especially since Muhammad wanted to see me before his death, and Islam tried to tell me something before his death?

Great reward comes with great tribulation. When Allah loves a people, He afflicts them. So, whoever is content, for him is contentment, and whoever is displeased, for him is displeasure. preoccupation with thinking about the death of children is of no benefit. Rather, a Muslim should occupy himself with what benefits him in this world and the hereafter, and say: "Allah has decreed, and He does what He wills." For "if only" opens the door to the work of Satan. The victim of a fire is a martyr, and Muslim children who die before puberty are among the people of Paradise.