Radar was not mistaken - there really is life on the planet, at least in the form of vegetation. After the lava lakes and rivers, a terrain similar to Iceland begins. Also, there is water, but its temperature is about 75 degrees Celsius.
It remains to find the very place where the signal comes from. Who is it? A creature? Or something else?

Specialy thanks Szilárd Bálint for spaceship model: https://sketchfab.com/3d-models/coronatrix-light-courier-43b06a832e954c4182434ced57e91015