I suggest to ask at dietpi forums, since we cannot help with 3rd party os/scripts.

Thank you, bro. I'll try it this evening after work. I'll post the results.

I want to install an image from the sd card to the internal memory in x96q tv box, it boots perfectly from sd card, without having to press anything, and everything works ok, even bluetooth adapter and video reproduction, my question is "do i still need to modify boot files to install in emmc or is not necessary? thanks in advance....

You can find everything you need here. H616 is similar to H618. https://forum.armbian.com/topic/29794-how-to-install-armbian-in-h618/

@flintduvaд secure boot might be similar to older Allwinner SOCs. https://forum.armbian.com/topic/58803-i-need-secure-image-x98h-pro/#comment-235213