As I wrote in my previous response, and as also written in the Export page itself, you need to filter in the "time tracking" view.
To change the date range, you need to click on the date selector (on the "September 2024" text) and adjust accordingly
If you want the invoice "grouped by task", instead of "filtered by task", then use the "work unit grouping" option in the Export page.
Any suggestions on how I can make this more understandable?