No boot with Ryzen 7800X3D/ Gigabyte B650 Gaming AX

Hi,
I upgraded to zen4 and I'm unable to boot Ventura 13.5 (full system or installer) since then.
My GPU is the Radeon 6800XT and my NVME drives are a pair of Crucial p5.
Using the same EFI folder that used to work with my zen3 setup gives me a prohibited sign right away (although I updated the AMD patches with the correct core count).
Using the EFI folder kindly shared by luchina-gabriel AND disabling resizeable bar in the bios takes me further in the loading process but still no...

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