The ruling on raising the index finger at the time of death

It is well known that al-Bukhari (may Allah have mercy on him) narrated a hadith: (That the Prophet (peace and blessings be upon him), at the time of his death, raised his hand or his finger — this is how it came in the narration of 'A'ishah (may Allah be pleased with her) —Then he said: in the highest company, three times, and then he passed away, peace and blessings be upon him) Is this narration acceptable as evidence for what some people do at the time of their death, namely that this is done to them, and that they raise their index fingers to testify, so that their last words in this world are the testimony,Meaning: pointing with their index fingers for that purpose?
The Prophet (peace and blessings be upon him) did not raise his hands for the testimony or for supplication, and raising the finger at the time of testimony requires proof from the Prophet (peace and blessings be upon him), but at the time of supplication, the finger is raised or the hand is raised.
So the Messenger (peace and blessings be upon him) raised his hand pointing to the highest company; because he was making supplication,He said: (O Allah, in the highest company) .