Hello Rahber,
Thank you for your answer.
By "row is bigger than...", do you mean the row number? If so, which is the maximum number of rows which a table can contain in order to be able to use the action "Get a row" without getting any error?
I use "Get a row from Excel" (Business Excel) action to retrieve data from a table with around 200.000 rows and 14 columns. The Excel file is stored in a SharePoint document library and Power Automate access it.