JFYI
There is a new version of grub4dos for UEFI, made by yaya, this is his third version: http://grub4dos.chenall.net/downloads/grub4dos-0.4.6a_for_UEFI-2020-11-26/
yaya's post on http://bbs.wuyou.net/forum.php?mod=viewthread&tid=422652
Please remember this is a work in progress so it is an experimental version.
This new grub4dos for UEFI was developed by yaya, so in no way I'm involved on it's development, but I think this thread deserves to be on this section of the forum just because the relevance of the subject. I made that desition because unfortunately the author hasn't opened a topic on this forum. Hope this desition is fine with forum admins.
On this topic we will talk about the experiences with this new version, as not all the usual commands work on this version.
So far our fellow wimb was able to sucessfully UEFI boot Win10XPE_x64.ISO, from internal HD and also from a USB device, hope he will share his experiences with all of us.
alacran