How can one supplicate and overcome the problem of losing affection and emotional dryness resulting from the absence of parental tenderness, especially the father's, which affects ambition and success?

The affliction of many people losing parental affection from a young age is due to not adopting the Prophetic upbringing or the dominance of materialism. This loss does not mean spiritual emptiness; for whoever strengthens their connection with Allah will not complain about the weakness of their connection with creation. And whoever finds solace in Allah will be self-sufficient through Him from all else, as Jacob said: "I only complain of my suffering and my grief to Allah, and I know from Allah that which you do not know."

One can build relationships with sisters in Islam, for the brotherhood/sisterhood of faith is stronger than the brotherhood/sisterhood of blood. And a person's engagement in acts of obedience, enjoining good, and forbidding evil fills their life and prevents emptiness.

As for supplication: Ask Allah for all the good that Muhammad (peace be upon him) asked for, and seek refuge from all the evil from which he sought refuge. Strive in the Prophetic supplications, and ask Allah to grant you a righteous husband and guide you to the best of morals.