Hi @Amani Christopher , you may try to use our app - Table Filter and Charts for Confluence. Maybe you have already installed it for your Confluence instance for filtering and aggregating tabular data (try to find the Table Filter macro into the macrobrowser).
For this case you may use the Table from CSV macro - it allows you to output a table from CSV or TSV data source. The macro supports outputting data from a URL (and Google Sheets as well) or an attached file. All the changes made to the original source are immediately reflected into Confluence.
Unfortunately, I'm not aware of any workarounds that can operate with multiple subsheets of the Excel files.
Maybe you should browse the Marketplace for this specific feature.
The apps besides ours that I've come across operated only with simple universal formats such as CSV, TSV, JSON.
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