If it is a static Data as you have it in the excel Table.
First import the excel Tables onto Powerapps, example Table1, Table2, Table3
After connecting, the 3 Tables, create a collection OnStart or Onvisible or Onselect of a Button;
ClearCollect (MyCombinedTable, Table1, Table2, Table3)
You can then use MyCombinedTable which will contain the full data
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