First some words about Linktap:
I have a LinkTag G2 installed and it’s working great witk Adrians App.
In addition I created a virtual switch.
- ON starts a Flow where I can start watering for a specific time
- OFF starts a Flow where I can stop watering immediatly
Two other flows are acting on the state change (if the valve is opening/closing on stored plan via LinkTap Android app) to change the virtual switch state.
Now to your question:
I habe some Xiaomi Mi Flora sensors. You can connect them to Homey via Bluetooh using the XiaomiMiFlora app.
My sensors are out of Homeys BT range. To solve this, I use an ESP32 to read sensors via BT and propagate the data via Wifi to a MQTT-Broker.
This way your can place the sensors and the ESP32 somewhere in Wifi range.
In Homey you can install MQTT broker app and MQTT client app to read the MQTT topics via Flow.
This way (direct BT or via ESP32/MQTT) you can react on sensor changes to change the LinkTap mode (or just activate/deactivate the mode) using Flows.
Some details about the sensors (sorry, german only 
):
