You can go to
realme UI 2.0 & above versions: Settings > realme Lab > Sleep Capsule
realme UI 1.0 & & R & Go & S & T & U Edition: not support
and click "You slept early 0 days this month" to enter the sharing interface. Click Share on this interface to share the number of days, or click the upper right corner to save it to the album and then share it.
Related Articles:
What is Sleep Capsule and how to use it
How to add Schedule downtime in Sleep Capsule