Factory reset with encrypted SD card

Welcome to my thread and thank you for your attention.
Recently, I have encrypted my external SD card and my phone had been factory reset without any backup.
Now, I could see those documents and files in my computer and phone, but I cannot open it because it says they are damaged.
I have searched that someone could changed some EFS metadata to recovery the files but I don't know the detail.
Is there any chance I could open the files again?
Please help me, I am really sad about it, thank you again.

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