This project show all different front end/apps/… : https://github.com/dbeley/awesome-lemmy?tab=readme-ov-file#alternative-front-ends
Maybe you can check how versatile made it: https://github.com/jmcollin78/versatile_thermostat Works like a charme here
Thanks ! Do you use it with alarmo ? How is the battery life time ? Do you succeed to get battery information via zigbee2mqtt ?