Last status: Created successfully
Data source: Google Search Console
Date range: last90days
Metrics: Impressions, Clicks, Average position
Split by (rows): Date, Search query
Max # of rows: 1000
Query ID: REFgy98aS
The date value amount depends on how many search queries there are per day and the maximum number of rows.
Supermetrics shows all results or first [max # of rows] rows of the results if there's more than [max # of rows] of results.
In this case, those three date values are the first three dates of last 90 days which means there are over 300 search queries per day.
So you can see the rest of the date values by increasing the maximum number of rows.
In addition to the 'last90' period, there should be also other date range options.