I think it is a good feature to add.
It should be flexible though.
I should be asking for Asr prsyer reminder 30 minutes before Magrib with a 10 minutes snooze. And a 40 minutes reminder for Zuhr before Asr with 5 minutes snooz. And so on for each prayer.
Snooz to work like the clock apps.
Separate ring sounds should also be allowed.
Jazakum Allahu Khair.