I have a similar problem.
I reinstalled Windows 7 and Fedora 33 having had several problems.
I don’t have Windows 7 available on start.
I tried to apply Twohot’s solution but I’m stuck in the Fedora personnalised disk partition.
I have :
sda1 a ntfs partition of 100 Mo for system informations
sda2 a 450 Go Ntfs partition for my windows
/ a 70 Go partition “fedora_localhost-live-root”
sda3 a 600 Mo /boot/efi partition
sda5 a /boot 1024 Mo parition
I tried to set the windows partition (sda2) mount point as /boot/efi but this is already taken for the sda3 and “/boot” is alerady taken by sda5.
I can’t set sda 1 as /boot/efi cause it’s a ntfs partition
What can I do ?
Thanks for your answers.