Success! Got Metal HD4000 accelerated graphics working using this flashing process
https://www.win-raid.com/t1053f39-Optiplex-and-VPro-AMT-ME-9.html#msg75549
Basically, setup a bootable FreeDOS USB drive with all of the files (FPT.EXE, fparts.txt, A29_AMT.bin, O7010A29.EXE) needed for enabling AMT on the 7010. If the BIOS is not already at A29, flash the BIOS to version A29 by running the update file. Then, shut the PC off and put a jumper on the the service mode pins. Then simply reboot up the PC with FreeDOS USB drive and run these commands:
FPT -rewrite -desc -f A29_AMT.bin
FPT -rewrite -ME -f A29_AMT.bin
FPT -greset
The first command will write to the Flash Descriptor and includes the change to enable AMT if it a machine that has the AMT lockout (6 according to the sticker inside the cover) as well as the change to disable the 3G driver since the Intel Anti-theft Technology is disabled in the ME due to being EOL. The second command flashes the ME region which includes enabling full AMT, including KVM, and the disabling of the EOL Intel Anti-theft Technology.
After the machine reboots, shut the PC off and remove the jumper from the service mode pins and boot back up and hold Ctrl+P when it reboots to go setup AMT. It will be listed as MEBx in the F12 boot options menu. The password starts as "admin" but you must specify a more elaborate password with uppercase/lowercase and punctuation characters. Then basically make sure AMT is enabled and continue to setup BIOS per the instructions for MacOS listed in the guide.
Metal shows up in the system report after these fixes. I applied it to my 2 7010 systems (both had ME lockout 6), a MT and USFF. There are service mode pins on all 7010 motherboards. Check the Dell 7010 manual to determine their locations.