Some Pritom tablets, particularly older or very cheap models, may not have a reliable built-in update system. If you cannot find the update function, you might need to check the manufacturer's website for manual update files. However, official downloads are often difficult to find. Many are scams or distribute malware that can permanently "brick" (ruin) your device.
Without this precise code, you cannot find the correct Pritom firmware.
This is the safest and recommended way to update your firmware.