It can take up to 15 minutes for a drive to be processed by MileIQ. Usually this process happens faster, but in areas with weak or blocked signals, it can take longer. MileIQ uses this 'settling time' to determine whether the movement that just occurred was a drive and whether you have come to a final resting point.
It is only at this point that MileIQ will record the drive and download a Drive Card to the app.
If you're using an Android device, please reference this article as well to ensure your device is optimized for MileIQ, and drives are uploaded as they're captured: Optimize Drive Detection on Android phones
If your drives still aren't showing up as expected, please take a look at the Drive detection best practices article.