Can't install Qubes on new machine - kernel panic with latest kernel (using boot partition with detached LUKS header on USB)

I followed this guide Install Qubes OS with boot partition and a detached LUKS header on USB to install Qubes 4.3 on my new machine. I implemented the edits to the guide here Install Qubes OS with boot partition and a detached LUKS header on USB - #62 by merowing and here Install Qubes OS with boot partition and a detached LUKS header on USB - #66 by merowing
At first, installation was successful, I got to the post-installation configuration screen and did everything there, but when trying to boot, I then had this issue Installing Qubes 4.2.0 on System76 Darter Pro (darp10) - Boot freezes at "Started accounts-daemon.service - Accounts Service"
So Qubes was booting up but it was frozen at “Started accounts-daemon.service - Accounts Service”.
Based on the solution listed in that thread, I repeated the installation process using “Install QubesOS with kernel latest”. But now, I cannot get to the post-installation configuration screen (where you set up sys-qubes etc), because it brings me to a kernel panic screen.
I tried to edit the grub menu with skip-autostart as that has solved issues before, but no luck.
Can anyone please help me?
In case it is relevant, my motherboard is from 3mdeb, with Dasharo (coreboot+UEFI) pre-installed/flashed by 3mdeb.