Then there is something wrong with your email system, on the same day your tech provided the 1st and only technical support response (about a week earlier I got an email stating that tech would be getting with me soon) that described in theory how you product was supposed to work, I responded asking for fixes’ not theory, never received an email last Friday did that include the asked for things to try? because to date I have only received 1 email not 2.
As I said in my post on the forum, and the initial email, I followed every step in your wiki(mmWave Human Detection Sensor Kit | Seeed Studio Wiki) that is how I was able to enter it into esphome and update the firmware. The real question here is why did your rep not provide some suggestions on what to try to get it to work in the first place, I assume you read my original email and the included logs and screen shots?
Finally, instead of taking this opportunity in this post to provide a meaning full solution or show any interest in providing such, you take this approach. I have moved on from this product and as such won’t spend any more time trying to explain or get it to work, just consider my purchase a donation.