This graph from Sleep Cycle shows my sleep gradually deepening until I get up. Mobile phone apps for monitoring sleep are not as reliable as the kind of kit used in sleep labs, so take this with a pinch of salt.
https://s3.v5.yokai.cafe/blobcatfiles/4a75fa1262210730f0fbae238d12474e45de5f15f134e828a2828ba7477ff73b.png