of course.
The api call I used is below.
“https://servername.com/api/v4/channels/channel_Id/posts?page=0&per_page=100&since=Unix_Timestamp”
Messages that existed after the unix timestamp were expected to be returned. However, much earlier data (ex: timestamp was May 10, 2020, but all data was imported on May 1) was returned.
And I set per page to 100, but I got a thousand data returned.