This guy has written some articles about this, but doesn't really imply humans are able to survive there. He is an legit doctoral researcher, but not in anything relating about space. He just writes random articles for fun and isn't an actual authority figure on space.

A region of the layer of atmosphere 50-60km above the surface of Venus is thought to be the the most similar atmospheric conditions to Earth in our solar system. The atmospheric pressure and temperature of the air in this region is similar to ours, but the composition of gases is not exactly breathable.

So no, this layer would not be sustainable for human life.