You can export date wise campaign stats from three places.

1. Reports section

Click the profile name dropdown, select the campaign name or all, select the time period and click export.

2. From Campaign Manager. Click the ellipsis icon for the respective campaign and select "export stats: from the dropdown. See screenshot below.
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3. From the campaign overview page. Click the green "Export Stats" button. See screenshot below.

Once you export, you a csv will download. Sample file below.