noob404 I have tried to compile the 5.15.15 belize on ubuntu 22.10 (desktop) and on fedora 37 lxde (ps4).
Update: After much Googling I think I may have discovered the underlying cause behind the issue with fedora ps4 compiling the bzImage as dos executable. Assuming what I found is correct the issue stems from the distro being built in efi mode. Unfortunately I remember having all kinds of issues trying to build the distro without the efi partition.
I haven't yet found a cause for the ubuntu pc issue when trying to compile the 5.15.15