I suggest you contact Support with this query; it may be that nothing else is required for ESXi 8, but simply because NDE (deployment engine) and Easy Scale (semi-automated cluster scaling) aren't going to support vSphere 8, "NetApp HCI" as such won't have it listed.
But as you can see here, it appears installation and even expansion (using host profiles) are possible.
I understand that NetApp isn't motivated to use resources to continue improving tools for vsphere 8 that NetApp decided in future to discontinue such as NDE (deployment engine) and Easy Scale (semi-automated cluster scaling).
We are completely fine with manual installation of ESXi 8.x on NetApp compute nodes without the use of NetApp additional tools build for vsphere 8.x.
From production perspective it is important to us just that NetApp send required information to VMware that ESXi 8 can be installed on NetApp H410c compute nodes so we don't lose VMware support in case of upgrade from ESXi 7 to ESXi 8.
As per your advice, we will also contact NetApp support for additional information.