Unable to render successfully on my Ipad Pro M2, 4K footage video & short duration editting.

[KenKeninKen]

I'm editting 4K footage video and can't even export it in my iPad pro M2.

I change the preset to FHD and still no hope.

4K render not happening, FHD and HD also unable to render.

There is only 2 options. "unable to render successfully" or "crash"

[KenKeninKen]

Here's my update report Sun, 17th April 2023.
HEIF FORMAT.
When the editing process is not just videos, I have pictures that are included in the timeline. This is an image in HEIF format that I took from my iPhone. So far I still haven't been able to export my project, maybe one of them is because there are images in that format.