On a hackintosh the inclusion of apfs.efi in the EFI boot partition folder will cause a verbose output to flash on the screen right before the Clover menu pops up, if you don’t like this there is a actually a way to make it go away.
The verbose output displays information related to any APFS formatted hard drive you have connected to your hackintosh. If you don’t have any APFS drivers you will only see one or two lines, but with APFS formatted drives will see a wall of text. APFS.efi is needed if you have or plan to use APFS formatted drives so it can’t remove it as it’s needed to display + boot any APFS formatted drives in Clover, but what can be done is replace it with a patched version that can hide the verbose output.
For instructions on how that’s done see: How-to update and patch apfs.efi on a Hackintosh