Creating an installer on MacOS doesn’t create EFI partition

I was following the guide to creating an installer in MacOS, which downloaded without incident. The only problem is that it created a disk image called “Shared Support”. My actual disk (which is called Install MacOS Ventura) doesn’t have an EFI partition whereas “Shared Support” does. The EFI partition on Shared Support appears to be a read only file system so I can’t make an EFI folder for it. How can I resolve this? I can’t seem to change the permissions of Shared support…

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