Never had this issue before with my dual boot
my computer is in Secure Mode because i run Windows 11 due to applications not being compatible with some Arch system
but i am dealing with
this issue: grub prohibited by secure boot policy then it goes into grub rescue
i found some solutions on line that i did not trust so id rather reach out here
Welcome 
You can disable fast and secure boot, M$ works fine, you need it only on fresh installation for M$.
Post always garuda-inxi on help requests, if needed use live ISO.
Go into BIOS, edit fast and secure boot and change boot order to garuda.
You need secure boot to use Windows 11 my guy,
Windows will still Boot fine but it won’t allow you to login
SO secure boot IS still needed,
as i said before i never had this issue till now.
Was able to dual boot with Secure Boot on just fine.
It works fine on my notebooks, but, dual boot is not supported by Garuda Linux.
I’m also dual booting with Windows 11 removing secure boot. TPM 2.0 is required, and this often created confusion in the past.
Actually you can install Windows with or without it, but it may depend on you particular ISO. There is a fix for it out there.
i have 2.0
as i said earlier it worked before i have windows on one drive and Garuda on another drive
That’s really strange. I’m sure there are many users here dual booting without secure boot.
Anyway, the guide to implement it is the Arch one:
But searching in the forum you’ll find several useful topics.
I’m just linking one, but I never had to and wanted to deal with it.
As said, this is not officially supported.
Microsoft itself says that the computer must be capable of secure boot, not that it must be activated in the requirements posted by @filo
First time I read this.
Booting into my Windows 11 copy with secure boot disabled just fine