To be honest, I don’t often give compliments to others. Firstly, I don’t like being complimented myself. Secondly, I’ve often gotten an “Okay, you’re funny” or something similar in response (even for the simplest compliments with no hidden suggestive thoughts), which didn’t feel like other persons liked being complimented.
If it’s just the ntfy app that sends these alerts it should be easy enough to send the developers of that app a feature request to implement a sleep mode which can be scheduled to mute the notifications.