Integrated GPU is not a dirty word anymore.
AMD’s system-on-a-chips with RDNA2/3 pack almost the same punch as the discrete cards with the same architecture. See steamdeck as the prime example, but there’s quite a few boards, boxes and laptops with the same.
Standardized firmware isn’t something that’s specified in the ISA, is it? It’s just shitty phone manufacturers.
Asus had some x86 phones a few years back. I haven’t dug into them, but I doubt they had a full bios/efi.
pine64 arm devices have u-boot, while a bootloader does fullfil a subset of the uefi spec.