Hi
I can see that this has been requested before in 2018 ( Alarm slide to dismiss/snooze instead of button ) but was at that time dismissed with the reason “we try to avoid any custom components on screen“.
Because I think it is an important feature (to avoid missing alarms because off ‘pocket dismiss’) I would like to request this feature again and in that context I also want to refer to that the default google alarm clock quite recently has added this feature (if activated by the user in the app).
(One reference (and also my own real life experience as well 
) :
I hope this does make this request more ‘acceptable’ for ‘Sleep as Android’
Best regards
Frank