Repair GRUB after motherboard replacement

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1

After motherboard replacement i’m only able to boot into windows, even though my disks with fedora installed are visible.
How can i repair the GRUB?

My setup:
1 disk just for windows
2 separate disks bound with mdadm (raid 0) and encrypted with LUKS for fedora

2

output of lsblk

liveuser@localhost-live:~$ lsblk 
NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
loop0         7:0    0   1.6G  1 loop /run/rootfsbase
sda           8:0    1  14.4G  0 disk 
└─sda1        8:1    1  14.4G  0 part /run/initramfs/live
sdb           8:16   1   7.5G  0 disk 
└─sdb1        8:17   1   7.5G  0 part /run/media/liveuser/9467-CED7
zram0       252:0    0     8G  0 disk [SWAP]
nvme0n1     259:0    0 238.5G  0 disk 
├─nvme0n1p1 259:1    0   100M  0 part 
├─nvme0n1p2 259:2    0    16M  0 part 
├─nvme0n1p3 259:3    0 231.9G  0 part 
├─nvme0n1p4 259:4    0   840M  0 part 
├─nvme0n1p5 259:5    0     1G  0 part 
└─nvme0n1p6 259:6    0     4G  0 part /run/media/liveuser/7d687dbc-9497-42c2-8484-ee1159a8d839
nvme1n1     259:7    0 931.5G  0 disk 
├─nvme1n1p1 259:8    0 822.1G  0 part 
└─nvme1n1p2 259:9    0 109.5G  0 part 
nvme2n1     259:10   0 931.5G  0 disk 
├─nvme2n1p1 259:11   0 822.1G  0 part 
└─nvme2n1p2 259:12   0 109.5G  0 part

nvme1n1 and nvme2n1 are my drives that i used to create root and home partitions.

nvme1n1p2 and nvme2n1p2 - root

nvme1n1p1 and nvme2n1p1 - home

nvme0n1p5 is my /boot/efi partition and nvme0n1p6 my /boot

can’t determine the primary disk using mdmadm --examine

liveuser@localhost-live:~$ sudo mdadm --examine /dev/nvme1n1
/dev/nvme1n1:
   MBR Magic : aa55
Partition[0] :   1953525167 sectors at            1 (type ee)
liveuser@localhost-live:~$ sudo mdadm --examine /dev/nvme2n1
/dev/nvme2n1:
   MBR Magic : aa55
Partition[0] :   1953525167 sectors at            1 (type ee)
3

dear @computersavvy could you please take a look?

i’m able to decrypt all 4 partitions from both drives separately(not as raid device), but as they were used for raid0 i can’t fetch files from there directly.

Trying to assemble the drives fails because superblock wasn’t found. Is there a chance it may be recovered from boot partition?

Once i’m able to reassemble raid, recovering grub seems to be pretty straightforward process - The GRUB2 Bootloader – Installation and Configuration :: Fedora Docs