I now actually see after some more reading and checking other SoC's that the CPU's in the A733 must start the kernel at EL2. See also ARM reference doc: 102412_0103_01_en So also 5.x kernel should work if EL2 I think If the A733 has not implemented EL2 and EL3 as could be the case as suggested in ARM reference doc, no KVM. See chapter6: As it is Allwinner, I won't be surprised, but wait and see what Radxa will come up with.

Hm I briefly remember there was an optional overlay to raise voltage to 1.3 volts..but I don't know why it should be now standard. Did not do any investigation though

npu is there in both vendor bsp kernel 6.1.y. There is no node exposed afaik. Everthing beyond like libraries to use npu is userspace and out of scope of Armbian. edge 6.18.y also has reverse-engineered npu support with a driver called Rocket.

But.... i can run from IOT img WTF

That isn't some you can do in armbian-config. This is Linux, use search to find how others have solved this.