Blitzwolf BW-DS04

Is it possible to use this soil moisture device with Homey?

Not without an app.
An alternative can be:
Misol

The app works with the Misol Gateway https://www.aliexpress.com/i/4000852618353.html and the Misol Soil Moisture sensor https://www.aliexpress.com/i/33056433752.html

What do You think about trying to listen this Blitzwolf DS-04 via some “rtl_433”? Is it possible, for example by using some device and integration with Home Assistant?