I suspect you are running into this Clean install of 24.10.0 results in "cannot import ‘boot-pool’ : no such pool available" - #14 by CubedRoot issue.
The kernel taint is normal as ZFS is licensed under CDDL and not GPL.
Does the console drop into an (initramfs) shell? See what I did to fix that here: TrueNAS SCALE 24.10 Failed to Find boot-pool After Installation – PK1048