You can find specific firmware and JSON files for QMK-compatible keyboards on the Keychron Firmware Page .
The V22 build for the Q6x series is a significant milestone. Most users report several key improvements after flashing this version: q6x v22 firmware link
Here is where caution is paramount. If you simply Google and click the first result, you are gambling with your device and your digital security. You can find specific firmware and JSON files