Searching around to try and fix this I’ve found numerous posts that Wolfson drivers do not work with the latest kernel.
Maybe this is the issue.
You mention not having a real a card to test so I’m assuming you don’t know for sure it works with the current system.
I did aplay -l and got “ card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA] “ as the only card available so guess that confirms the drivers aren’t loading.
So you have an older 3.10 version as I believe the wolfson drivers still worked with that.