Well, after reading some more into it, I decided to keep it for extra security.
But it would still be nice to know and understand how this works.
Following this tutorial,
Code:
https://forums.kali.org/showthread.php?36601-UEFI-How-to-repair-kali-linux-grub-dual-boot-with-Windows-10
Code:
grub-install /dev/sda
Partitioning Scheme:/sda1 /boot/EFI (unencrypted; as far as I know...)
/sda2 Kali (encrypted)
/mapper/Crypto-root
/mapper/Crypto-home
/mapper/Crypto-tmp
/mapper/Crypto-var
/mapper/Crypto-swap
/sdb1 Windows
I attempted to run:
grub-install /dev/sda1
grub-install /dev/sda3
Note that when installing Guided Use Entire HDD LVM Encrypted, grub is not encrypted. However, when creating your own partitions for Encrypted LVM on only half of the HDD (is that a threat for data leak??), grub fails with Dummy Install Failed, hence the link above and the unintentionally encrypted bootloader.
This is all theoretical now though, so dont stress yourself. Im going to stay encrypted.