I'm not sure what triggered the latest disapperance of my keyboard zoom shortcuts. Curious if anyone else is having this issure recently. So far I've tried a reboot, new PS preferences, reinstalled Photoshop and then completely wiped out all adobe software from the system and reinstalled everything. It would appear I'm missing the same shortcuts from the Illustrator beta as well. The only thing that's changed recently was the Big Sur update this week.
I can confirm something with the Big Sur 11.3.1 updated has taken over the zoom keyboard commands at least on an M1 Air's. I have a second M1 Mac, zoom keyboard shortcuts were all working fine, updated to 11.3.1 and shortcuts are no longer working.