Save And Export Notebook Option - Is not Visible

Hello,

**1. Export Option:**
"Save And Export Notebook Option" is not visible in the jupyter file menu. Is there any workarounds or bug fix available ?.

**Current Version:**
Notebook - 7.0.4
jupyter- 1.0.0
jupyterlab - 4.0.6

**2. nbconvert:**
**Also, tried nbconvert**:
"jupyter nbconvert --to pdf filename.ipynb"

still getting below error message:
from collections import Mapping
ImportError: cannot import name 'Mapping' from 'collections'

Thank you.
Vivek

First reproduce the missing File-menu option in Notebook 7.0.4 with Jupyter 1.0.0 and JupyterLab 4.0.6. Then run `jupyter nbconvert --to pdf filename.ipynb` and investigate the reported `Mapping` import error; the issue is done when the export option is available and PDF conversion works without that error.

Written by the indexing model from the issue text.