Is seeing Gabriel, Muhammad (peace be upon him), and the angels a real confirmation of a protest march that must be believed, or is it a visual hallucination?

Firstly: Angels were created from light, and no one can claim to have seen them in their true form except prophets. However, they can be seen in human form. The Prophet (peace be upon him) was able to see Jibreel in his true form.

Secondly: The claim of seeing the Prophet (peace be upon him) while awake after his death has no basis in Islamic law. It is among the sayings of misguided Sufis. The hadith "Whoever sees me in a dream will see me while awake" does not mean seeing him while awake in this world. Rather, it has other interpretations, such as seeing him in Paradise or seeing the confirmation of one's dream in the Hereafter. If such a claim were true, it would make those who claim it Companions, and companionship would continue until the Day of Judgment, which is false.

Thirdly: Legislation was completed during the lifetime of the Prophet (peace be upon him), and Allah Almighty perfected the religion. Therefore, there is no need for claims of seeing him and taking legislation from him after his death.