Hello, my last problem has been solved.
I found the firmware of an MBP, and then extracted the "applebootpolicy" file from it. After inserting it into ROM, my computer will display the recovery option normally.
In my opinion, Ozmosis is a good boot tool. It can be independent of files on EFI partition of hard disk. It happens that the BIOS on my motherboard is removable, so I really want to write the entire ozmosis to the BIOS. After this period of study, I found that Ozmosis is still a little imperfect. I look forward to your update, and I will always pay attention to it.
Thank you again.