Yes, it is possible that there may be gases similar to oxygen in the universe. Oxygen is one of the most abundant elements in the universe, and it is created through nuclear reactions in stars and during supernova explosions. These processes distribute oxygen throughout space.
In addition to oxygen, there are many other elements in the universe, each with its own unique properties. Elements like hydrogen, helium, carbon, nitrogen, and many others are also present. These elements can combine in various ways to form different types of gases.
While oxygen is essential for life as we know it on Earth, it is not the only gas that can support life. There may be other gases in the universe that could potentially serve as respiratory gases for different forms of life, assuming they have evolved to adapt to those conditions.
It's important to note that our understanding of the universe is based on our current knowledge and observations. As scientific exploration continues and new discoveries are made, we may uncover gases and elements that are currently unknown to us.