What is the ruling on praying over an absent deceased?

Question : May Allah bless you. If a man dies in a certain country, which is an Islamic land, and the funeral prayer has already been performed for him, it is permissible to pray for him in another place. For example, if a man’s father dies and the funeral prayer is performed for him in his country, should a vow be made for him, and is it prescribed to pray the funeral prayer for him?

Answer : This concerns the prayer for the absent deceased. There is scholarly disagreement regarding the prayer for the absent deceased. What appears to be the case is that one does not pray for the absent deceased unless the funeral prayer has not been performed for him.
For example, if a person drowns in the sea and no one prays for him, or if he dies in a country where we do not know whether they prayed for him or not because it is a land of disbelief, then the funeral prayer is performed for him. The evidence for this is the hadith of the Negus. However, if the funeral prayer has already been performed for him, then it is not performed for him under any circumstances. This is because great imams died during the time of the Companions (may Allah be pleased with them) and they did not pray for them, and this was also the case during the time of the Prophet (peace and blessings be upon him). The third opinion is that...
Yes. The third opinion is that the funeral prayer is performed for the absent deceased if he was of benefit to Islam, such as a scholar, a merchant who gives charity, or the like. As for the general public, the funeral prayer is not performed for them.
There is also a fourth opinion which states that the funeral prayer is performed for every absent deceased, for every deceased person who is absent. Then, based on this opinion, they held that a person should, when he intends to sleep, perform the prayer for the absent deceased for every Muslim who died on that day. Yes, and this is undoubtedly a religious innovation (bid'ah). The stronger opinion, in my view, is what the Shaykh al-Islam Ibn Taymiyyah (may Allah have mercy on him) held, which is that the funeral prayer is not performed for the absent deceased except for those for whom it has not been performed. Did you see the Negus? No, I did not pray for him. This is evil. May Allah keep you safe. We do not know about Islam.