I have a new computer with Windows 11. When I create a new rescue media I check the enable multi boot option. When I restart my computer I do not see two boot options as I did on my prior computer whit Windows 10. I tried using both the default base WIM of Windows RE as well as the Windows PE 11 (WADK) in the hope that this might help.
How can I get a multi boot to happen?

You have to select “Windows Boot Menu” as the build target. The “Enable multi-boot” option is something you see when building to a USB target, and it has to do with making sure the flash drive supports BIOS and UEFI boot modes. That’s a completely separate thing.

Super!! I understand now and you have resolved the problem. Thank you.