It's less common now but pc keyboards always had the empty up arrow on shift in the 80s/90s and still common into the oughts: https://upload.wikimedia.org/wikipedia/commons/d/d8/IBM_Mode...

I’ve got 4 keyboards in front of me and not a single one of them have the word shift. All English QWERTY keyboards too.

These are British keyboards though. So maybe this is a European vs US keyboard difference?

The crappy Dell KB813t that The Company has provided me has an outlined up-arrow.

https://www.dell.com/en-us/shop/dell-keyboard-smartcard-usb/...

AZERTY keyboards for instance have it, since "Shift" is not a native French word (sometimes they do write "Maj.", but mostly they simply use the arrow). Also happens with some keys such as Caps Lock (a padlock symbol).

All of my keyboards have only an up arrow, not the "shift" word. They aren't english keyboards though.