Looks like there's a motion sensor and hardwiring kit available for Aukey dashcams. Hopefully it's more sophisticated than just powering up the camera when motion is detected because the camera takes a good 15-20 seconds to boot up. I don't currently own this but I thought I'd pass this information along. The link is not an affiliate link.
https://www.amazon.com/gp/B07J3BLFBN
https://www.amazon.com/gp/B07J3BLFBN