Do as you want, but to me it’s not a different question.
My problem is, just as was the problem in the first thread, that, after having installed Fedora 33 with a USB drive, I now have no possibility to start my Windows and this is why I’ve posted in this thread.
The fact that I can’t mount my NTFS partition as /boot/efi is just relevant to the fact that I can’t apply what seems to be the answer provided by Twohot and therefor can’t solve the problem of the thread.
Yeah, that’s why I think a new question is best. That question has an answer which will apply to many other people (which is good and it’ll be helpful for people to find it quickly) but you have a special case that needs to be addressed differently.