Matching would definitely be preferred, but given the fact that it's a first attempt at a product with a small form factor making swapping difficult, I see the mismatched symbols as a small concession to the overall experience.
Bluetooth first generally because you use a companion app on your phone to interface with the device and the BLE chip (nrf25840) sips power compared to the esp based wifi chips, that you will likely be supplying with a battery of some sort.
You will definitely want to reprint it in something else while the printer is working. Otherwise you're going to see dimensional accuracy issues crop up over time that require you to keep adjusting the belts.
Can you share the recipe/video?