I would like to know how i can create and iso from an extracted cd directory

I would like to know how i can create and iso from an extracted cd directory
I have modified the rootfs and it boots but it can’t boot on efi , is there a solution about that?
I know how to make isos for debian or ubuntu but fedora must be different there is no isolinux
i have tried but the iso can’t boot on efi.

Before anyone can know what might have gone wrong it is necessary to know in detail what has been tried.

Please provide details – step by step