Hey there, thanks for sharing your question and welcome to the Streamlit community! 
The “Your app is in the oven” message means your app is stuck during deployment. Based on your details, the main issue is with your Python version: you listed “2.2.0” in your requirements.txt, but Streamlit Community Cloud does not support specifying the Python version in requirements.txt—Python is not a pip package and this will cause dependency resolution to fail. You should remove the Python version line from requirements.txt entirely. Instead, set the Python version using the “Advanced settings” dialog during deployment or from your app’s settings in the dashboard. Also, make sure all other dependencies are compatible with your chosen Python version and that you don’t include standard library modules in requirements.txt.
For more info, see the official docs on app dependencies and why not to include Python in requirements.txt. If you still have trouble, check your deployment logs for specific errors and share your requirements.txt and any error messages for more targeted help. Community members, feel free to jump in with your insights!
Sources: