Creating a rootfs image (Raspberry Pi 4)

Hey I'm looking to create an image for my raspberry pi to boot, but the provided binary/boot RHEL 8 isos all required EFI compatibility to boot.

I've had luck downloading the KVM guest images and extracting the XFS partition, but they seem to be read only file systems.

So right now I'm looking to either:

a. Make the file system read/write again
b. Generate an aarch64 image with everything already installed

As for b, Image Builder looked promising, but I don't think I can use an x86_64 machine to generate aarch64 images, so I'm just kind of stuck right now

EDIT: Also I currently have a running RHEL 8 cloud image on my pi, but like I said, the filesystem is read only right now.

EDIT 2: Looks like my UUID changed, updated my fstab and root file system is writeable now