It is said whatever we desire in heaven, it would pe possible, sayedna in Jannah, can we feel sorrow and mourn for imam Hussayn and the tragedy of karbala despite of the delightness and happiness in heaven

We can desire whatever we want in heaven, but it seems that when we drink from the Pool of Kawthar, Allah removes the capacity for sadness form our hearts. We will be able to see the greatness of Imam Hussain (a) there, but we may not grieve and be sad for eternity about it. When we see Allah’s compensation, the potential sadness turns into joy.