I currently have a similar setup (ESP32, BLE Sensors with ESPHome). Only problem is my sensors are Cr2032 and they go through a shit ton of batteries.

Is there a write up somewhere on how to get these working? I’d like to replace all mine!

Same here - I had to click on “Log In” which takes you to the actual login page (not just the user/pass field at the top right that you get on the main homepage) and that worked for me.