Article 5RB30 why is my ubuntu Grub can't find windows 10?

why is my ubuntu Grub can't find windows 10?

by
ct7567
from LinuxQuestions.org on (#5RB30)
Hello there.
I've been using Ubuntu 20.04 along side with windows 10 for a while now. Today i decided to install Manjaro next to them just for fun and testings.
Manjaro installation didn't find my windows. And i must say that i have a very special situation. I have an SSD which contains my windows & EFI partiton & Ubuntu & some partitions which microsoft windows created it self; I have an HDD which contains my personal Files and Manjaro.
So I have 3 OS, one in HDD and 2 in SSD. my EFI partition is also in SSD and it's about 100 MB.
I tried os-prober and grub-mkconfig and update grub in both Ubuntu and Manjaro. They find each other but not the windows. Although I can get to my windows in bios but i really want it in grub.

please help me out.:confused:latest?d=yIl2AUoC8zA latest?i=e142lrRoFM0:f-W9eewS4uM:F7zBnMy latest?i=e142lrRoFM0:f-W9eewS4uM:V_sGLiP latest?d=qj6IDK7rITs latest?i=e142lrRoFM0:f-W9eewS4uM:gIN9vFwe142lrRoFM0
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