I just wound up using translucent ones which came with them, with the LEDs set to solid colors to group functionality together, and a legend on the display. Zoom keys blue, lights yellow, etc.
I had an XKeys strip for a previous iteration, which included similar keycaps. My hand-written labels were ugly, so I skipped them this time around.
I've done something pretty similar with an Adafruit Macropad, Karabiner Elements (and Zoom's global hotkey support), hass-cli, and a few esphome-loaded ESP32 devices. Physical audio/video mute, raise hand, lights, speaker/headphone switch, and screen lock buttons are wonderful.
I had an XKeys strip for a previous iteration, which included similar keycaps. My hand-written labels were ugly, so I skipped them this time around.