Why isn't the today graph for sleep alignment not showing in Garmin Connect for Android?

The question is in the subject. It should be noted that the Garmin Connect version is current as of this writing, and multiple day graphs seem to be displayed correctly.

0 trux 23 days ago

What is sleep alignment? Do you mean the graph of sleep stages or something else? Can you see the sleep data on the watch?

If present on the watch, and not in Garmin Connect, then I recommend to Remove and Add the Device From the Garmin Connect App, wait till the next morning, sync, and see whether it helped. If not, then have a look at the Troubleshooting guide for (some) data missing after syncing for more tips.

If not present on the watch either, then check whether any heart rate was recorded during the night. If not, then you probably enabled the Battery Saver during sleep, which powers off the HR sensor. Either disable it, or edit the battery saver, and allow the wrist HR.