Hello,
I found this solution.
Change the table Items property adding a column to the source (use AddColumns function).
Define the value of the new column appling, to the original date column, the date format you prefer (in my case Italian)
AddColumns(
'SourceTableName',
CreatedFormatted, //name of the new column
Text(Created,DateTimeFormat.ShortDate,"it-IT")
)
Than in the Table fields selection select the new column (CreatedFormatted) instead the original one (Created)