Can a mother whose child has died see him in Paradise at the same age he died, and raise him and marry him off in Paradise?

Allah the Almighty will gather the believers and their offspring in Paradise, and their young children will be joined with them if they were from the people of faith, as He, the Almighty, said: "And those who believed and whose offspring followed them in faith – We will join with them their offspring" [At-Tur: 21].

Scholars have agreed that the young children of Muslims will be in Paradise, and they will take their parents by the hand into it. They will enter Paradise at the age of its inhabitants (30 or 33 years), as narrated by Al-Tirmidhi from Mu'adh, may Allah be pleased with him. Young children will not grow in it, but rather they will be returned to this perfect age.