Install Alongside Does Not Come Windows 11 and Zorin 16 Core

[zabadabadoo]

@RTB

The 3 partitions after the C drive are the zorin partitions I created as part of the install process. (root, home and efi boot)

I think that is your problem. You have created a second (unwanted) efi partition.
Wait for others (e.g. @337harvey, @Aravisian) to confirm my opinion and advise best way to fix the problem.

Also maybe worth having a look at this:

[HOW TO] Partition & Install Zorin 16

This step-by-step guide will allow you to partition your hard drive (HDD, SSD, NVMe) so that installation goes a little more smoothly. This will work for a multi-boot system as well, but you will have to resize your Windows partition first and you will be using the Windows Boot Manager EFI partition instead of creating one. Otherwise, partitioning is pretty much the same. Please be sure to perform the steps in Before You Install prior to attempting any of these changes. Mistakes and rushing …