use KNIME and Python OpenPyxl to read the index numbers of every sheet in an Excel file. Then use the index numbers to import the files back
("did someone say overengineered ...?")
there is a Jupyter notebook in the /data/kn_example_python_excel_sheet_index.ipynb folder to experiemnt with
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conda install -c conda-forge jupyterlab notebook
conda install -c conda-forge notebook
conda activate py3_knime
jupyter notebook