Summary
The pyomo license is not visible in the pypi metadata for 6.9.5. The license was previously visible up to and including 6.9.4.
Steps to reproduce the issue
Check the Meta section on these pypi version pages:
Additional information
At first sight the pyproject.toml file looks correct.
I've recently seen a similar issue on the psycopg project relating the version of twine used to upload the package. Maybe you could check this?