I see there is already a reference ticket around this Reporting - CSV Export: contains partial data nothing conclusive came out from it, Hence creating a new one.
the OP in the previous post is correct Kibana does not return you full data when imported.
Here the total hit is 80K+ from "2022-11-09 00:00:00 -> 2022-11-10 00:00:00"
When imported data in the same range (2022-11-09 00:00:00 -> 2022-11-10 00:00:00)
The resultant CSV only contains fewer entries
Kibana: 8.2.0
Let me know if you need any more data

