How to put Larkkey zigbee temperature humidity sensor TT081 in pairing mode
TLDR: it seems that the most important for pairing this sensor with Smart Life or Tuya Smart is to start the pairing on the application side BEFORE you press the reset on the sensor. If this is not enough, check the other recommendations below. The sensor is NOT correctly recognized by Zigbee2Mqtt in my tests, it can be registered however the values are not available.