The sensor requires an Aqara Hub with ZigBee in order to function correctly. Use with other ZigBee Hubs, especially in conjunction with the Smart Life app, is not supported. The sensor is specifically designed for the Aqara Hub platform and requires it for integration and control.

No, it's ZigBee, so you need a ZigBee coordinator

They use the same sensor but a different radio chipset - T1 uses Zigbee 3.0 and therefore requires a Zigbee 3.0 hub, while the other uses Zigbee 1.2 HA and will work with any hub. Both offer the same functions and performance with no special benefits (i.e. no "longer battery life" or "longer range" nonsense). Old versions are still sold to support the larger customer base with older hubs, and they are often cheaper too.

I don't know the model number, but it is Zigbee compatible, yes

Yes, an Aqara Hub is required for this item. Aqara Hub M1S Gen 2