How can I convert an imported .parquet file correctly, using Excel's Power Query Editor?
Are there drivers available for this in Excel?
You can use the inbuilt connector in Power BI:
https://learn.microsoft.com/en-us/power-query/connectors/parquet
let
Source = Parquet.Document(File.Contents("C:\xxx\userdata1.parquet"), [Compression=null, LegacyColumnNameEncoding=false, MaxDepth=null])
in
Source
In Excel, I believe you need a 3rd party connector.