How to change kernel in garuda?

Issues & Assistance
1

After installing (sudo pacman -S linux-zen) I am told to re-load my grub bootloader config. How do I find where it is? I have refreshed a few files that seemed to look like it but zen does not show in my advanced options when restarting

2 
mhwd-kernel -li             
Currently running: 5.10.11-zen2-1-zen (linux-zen)
The following kernels are installed in your system:
local/linux-zen 5.10.11.zen2-1
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