You can use CAST to extract parts of the timestamp values:
# entry$raw table
review_requested_at
2020-06-19T21:23:26.990971 |
2020-06-25T18:38:34.777950 |
# SQL query
SELECT CAST(se.review_status_changed_at AS DATE) as "Date Task Completed"
# Output
Date Task Completed
2020-06-19 |
2020-06-26 |