There's the Tuya, which does work with Home Assistant and Zigbee2MQTT
Maybe not worring too much about fully understanding Home Assistant, and using it as a bridge for devices that are unsupported on Hubitat, together with Home Assistant Device Bridge would serve you better. I didn't understand it much at all when I started with it, and for the most part I wouldn't call myself an expert today either. It is primarily my bridge to get unsupported devices back to Hubitat so I can use them in Rule Machine automations.
What is it you don't like about the Aeotec HEM5? I have three Aeotec HEM v1 units, and while they can be really chatty if set to report too frequently (makes sense), they are solid units and do their job admirly. By the way, out of the three I have, one of them is directly joined to Home Assistant and it works even better there than on HE.
Is there something specific you're missing with the Aeotec HEM5 that you're hoping to replace with a Zigbee HEM?
