I can reproduce this report with bare `pkginfo`:

-------------------------------- %< --------------------------------
$ python3.8 -m venv /tmp/lp-1953227

$ cd /tmp/lp-1953227/

$ bin/pip install --upgrade setuptools pip wheel
...

Successfully installed pip-21.3.1 setuptools-59.4.0 wheel-0.37.0

$ bin/pip install "pkginfo~=1.8.0"
Collecting pkginfo~=1.8.0
  Downloading pkginfo-1.8.2-py2.py3-none-any.whl (26 kB)
Installing collected packages: pkginfo
Successfully installed pkginfo-1.8.2

$ wget https://files.pythonhosted.org/packages/72/8a/033b584f8dd863c07aa8877c2dd231777de0bb0b1338f4ac6a81999980ee/tensorflow-2.7.0-cp38-cp38-manylinux2010_x86_64.whl
...
2021-12-04 13:11:17 (1.76 MB/s) - ‘tensorflow-2.7.0-cp38-cp38-manylinux2010_x86_64.whl’ saved [489633495/489633495]

$ bin/pkginfo tensorflow-2.7.0-cp38-cp38-manylinux2010_x86_64.whl 
metadata_version: 1.2
name: gast
version: 0.4.0
platforms: ['UNKNOWN']
summary: Python AST that abstracts the underlying Python version
description: A generic AST to represent Python2 and Python3's Abstract Syntax Tree(AST).

GAST provides a compatibility layer between the AST of various Python versions,
as produced by ``ast.parse`` from the standard ``ast`` module.
home_page: https://github.com/serge-sans-paille/gast/
...

$ bin/pip install "pkginfo<1.8.0"
...
Successfully installed pkginfo-1.7.1

$ bin/pkginfo tensorflow-2.7.0-cp38-cp38-manylinux2010_x86_64.whl 
metadata_version: 2.1
name: tensorflow
version: 2.7.0
platforms: ['UNKNOWN']
summary: TensorFlow is an open source machine learning framework for everyone.
description: [![Python](https://img.shields.io/pypi/pyversions/tensorflow.svg?style=plastic)](https://badge.fury.io/py/tensorflow)
[![PyPI](https://badge.fury.io/py/tensorflow.svg)](https://badge.fury.io/py/tensorflow)

TensorFlow is an open source software library for high performance numerical
computation. Its flexible architecture allows easy deployment of computation
across a variety of platforms (CPUs, GPUs, TPUs), and from desktops to clusters
of servers to mobile and edge devices.
...

-------------------------------- %< --------------------------------

It fails with the current release, too:

-------------------------------- %< --------------------------------
$ bin/pip install --upgrade pkginfo
...
Successfully installed pkginfo-1.8.2


$ bin/pkginfo tensorflow-2.7.0-cp38-cp38-manylinux2010_x86_64.whl 
metadata_version: 1.2
name: gast
version: 0.4.0
platforms: ['UNKNOWN']
summary: Python AST that abstracts the underlying Python version
description: A generic AST to represent Python2 and Python3's Abstract Syntax Tree(AST).
...
-------------------------------- %< --------------------------------

The 'tensorflow' wheel appears to vendor in a couple of 'gast'-related files:


-------------------------------- %< --------------------------------
$ unzip -l tensorflow-2.7.0-cp38-cp38-manylinux2010_x86_64.whl | grep gast
     2244  2021-11-01 17:17   tensorflow/python/autograph/pyct/gast_util.py
     1165  2021-11-01 17:17   tensorflow/include/external/gast_archive/PKG-INFO
-------------------------------- %< --------------------------------

I suspect that the last one is the source of the problem, here.