What is the meaning of Allah, the Most High, coming to the believers on the Day of Resurrection in a form other than the form they know Him by, and does that indicate that Allah has more than one form?

Al-Ghunayman mentioned that the vision of Allah Almighty is affirmed multiple times for trial, based on the Prophet’s (peace be upon him) saying: “Then the Compeller will come to them in a form other than the form in which they saw Him the first time,” narrated by Al-Bukhari and Muslim. And his saying in a narration by Muslim: “The Lord of the Worlds came to them in a form lower than the one in which they saw Him the first time.” It also came in Sahih Muslim that when they are asked: “Is there any sign between you and Him by which you recognize Him?” They will say: “Yes, the shin.” Then He will uncover His Shin, and at that moment they will recognize Him and prostrate to Him. When they raise their heads from prostration, behold, He will have returned to the form in which they saw Him the first time.