How does the Austrian School view land rents? I have come across these publications:
The Spatial Market Process. Advances in Austrian Economics Vol. 16.

In “An Austrian Theory of Spatial Land,” Fred E. Foldvary addresses
the disregard of spatial issues in basic Austrian economic theory as
formulated by Carl Menger (1871) and elaborated upon by Ludwig von
Mises (1940). Foldvary shows that Johann Heinrich von Thünen (1826)
and Henry George (1879/1884), in particular, serve to fill these gaps
in the classical Austrian theory of the market process.

Henry George and the Austrian Economists (Oscar Johannsen, 2003)
This article states that Rothbard had a Lockean view of property in land:

every man has the absolute right of property in his own self and in
the previously unowned natural resources which he finds
From what I heard, Austrian economics is descriptive, not prescriptive; for example, being an Austrian economist and a communist may not be a contradiction. However, the following represents the view of an average Austrian economist on land rents, based on my experience.
Land can be acquired by property transfer or by homesteading. Homesteading is mixing land with labor. Property rights to land can be lost by property transfer or by abandonment. Same as with any other property, the owner of land can rent to others.