Re-installing parts 1 & 2

[balanga]

https://www.ventoy.net/en/doc_non_destructive.html

3.2.3. The 1st partition must contains NTFS or EXT2/3/4 filesystem.
If partition 1 is NTFS, then ntfs-3g package must be installed.
If partition 1 is EXT2/3/4, then e2fsprogs package must be installed.

So look for ntfs-3g in your EFI and put e2fsprogs in, I guess?  Might need to copy from ventoy install archive or .iso

I have two Ventoy disks. Can I dd the first 1MB of one to the other?