While official support for running ESXi on Apple Hardware (Mac Pro and Mac Mini) has concluded with ESXi 7.x, it certainly has not discourage users from experimenting with newer ESXi releases. In fact, ESXi 8.x still runs like a champ on most x86 Apple Hardware platforms including the vintage Apple Mac Mini 7,1 (2014) and to the most recent Apple Mac Mini 8,1 (2018)!
For those with an Apple Mac Mini 8,1 (2018), the onboard Apple NVMe storage device can not be used out of the box with ESXi, without the use of the Community NVMe Driver for ESXi Fling. Surprisingly, the Community NVMe Driver for ESXI Fling is still functional even with the latest ESXi 8.x release, even though it was only created and supported during ESXi 7.x timeframe.
From the recent reports from the VMware Community, the Apple NVMe device can be detected up until ESXi 8.0 Update 1c (Build 22088125) but after upgrading to ESXi 8.0 Update 2 (22380479), it was no longer showing up.