You can use this DTH
To connect to the iris keypad
https://m.lowes.com/pd/Iris-White-Security-Alarm-Keypad-Works-with-Iris/999925326
This is what I use. And I have a core piston for different entry and exit delays depending on how it’s armed like keypad or minimote or voice command.
I would only reccomend exit delay through the lock Manager. Any other delay through smartapps other than CoRE don’t seem to work for me personally. CoRE has a lot more customization to it too so it always tends to be my go to smart app. The exit delay with the lock manager can be annoying though because keypad beeps during it. But I only tend to use keypad to disarm so it’s not really a problem.
Extra notes about the iris keypad:
It I has a temp sensor
Tamper sensor so if it’s taken off wall alarm can sound or send you a text
Motion sensor if hand swiped in front of it. Can be used to automate scenes.
Also when you swipe hand in front of keypad it lights up and will show you if it’s set to on (armed away), off (disarmed), and partial (armed home).