VMware does not support running ESXi 8.0 on Apple MacMini regardless if it is Intel or Apple silicone. But there is still a way to install VMware ESXi 8.0 on the 2018 Apple MacMini. Follow the How to create a bootable ESXi USB disk on macOS article. Once you have a bootable USB drive, we need to edit boot.cfg file located under EFI/boot/:
$ vim /Volumes/ESXI/EFI/boot/boot.cfg
Add the following line at the very bottom of the file:
Save and close the file.
Now we need to update boot.cfg under /bootbank partition before you reboot ESXi host. Press ALT+F1 to get into ESXi Shell. Login and update boot.cfg under /vmfs/volumes/BOOTBANK1 and /vmfs/volumes/BOOTBANK2 with the same configuration.