What happens if you press esc after u-boot’s “Hit any key to stop autoboot” countdown has expired? You should get to the grub menu which should offer to boot the previous kernel. This might not work either. This should be still recoverable but reinstalling fedora is probably less effort. I would provide instructions for recovery if there’s interest.
For a fresh installation delete the previous Fedora partitions (should be 4) see the partitioning cheatsheet in the AsahiLinux wiki.
I suspect the breaking change was Switch to the kernel-16k variant