models.py with many Models may be more difficult to maintain than shorter
models.py with fewer Models.
There is a limit to how many items a developer can consider when forming a mental model of source code.
It may be time to split an application if models.py is very long.
A good starting point would be to move models with the same prefix to a sub-application.
Django Doctor will run this check by default. No configuration is needed but the check can be turned on/off using check code
model-common-prefix in your pyproject.toml file.